diff --git a/colors.ts b/data/colors.ts
similarity index 100%
rename from colors.ts
rename to data/colors.ts
diff --git a/font.ts b/data/font.ts
similarity index 100%
rename from font.ts
rename to data/font.ts
diff --git a/icons.ts b/data/icons.ts
similarity index 100%
rename from icons.ts
rename to data/icons.ts
diff --git a/initialCart.json b/data/initialCart.json
similarity index 100%
rename from initialCart.json
rename to data/initialCart.json
diff --git a/manual.md b/docs/manual.md
similarity index 100%
rename from manual.md
rename to docs/manual.md
diff --git a/pico8_builtins.txt b/docs/pico8_builtins.txt
similarity index 100%
rename from pico8_builtins.txt
rename to docs/pico8_builtins.txt
diff --git a/codetab.ts b/editor/codetab.ts
similarity index 97%
rename from codetab.ts
rename to editor/codetab.ts
index 87bfde3..9a27cc4 100644
--- a/codetab.ts
+++ b/editor/codetab.ts
@@ -1,13 +1,13 @@
-import { clearScreen, fillRect } from "./window.ts";
-import { CHAR, font } from "./font.ts";
-import { drawText, measureText } from "./builtins.ts";
-import { COLOR } from "./colors.ts";
-import { getCodeSheet, setSheet } from "./sheet.ts";
-import { K, ctrlKeyDown, getKeyboardString, keyPressed, shiftKeyDown } from "./keyboard.ts";
-import { clipboard, tokenize } from "./deps.ts";
-import { getBuiltins } from "./runcode.ts";
+import { clearScreen, fillRect } from "../io/window.ts";
+import { CHAR, font } from "../data/font.ts";
+import { drawText, measureText } from "../runtime/builtins.ts";
+import { COLOR } from "../data/colors.ts";
+import { getCodeSheet, setSheet } from "../io/sheet.ts";
+import { K, ctrlKeyDown, getKeyboardString, keyPressed, shiftKeyDown } from "../io/keyboard.ts";
+import { clipboard, tokenize } from "../deps.ts";
+import { getBuiltins } from "../runtime/runcode.ts";
 import { page } from "./viewsheets.ts";
-import { mouseDown, mouseHeld, mousePos } from "./mouse.ts";
+import { mouseDown, mouseHeld, mousePos } from "../io/mouse.ts";
 
 const historyDebounceFrames = 20;
 
diff --git a/editmode.ts b/editor/editmode.ts
similarity index 85%
rename from editmode.ts
rename to editor/editmode.ts
index 5047a73..13e99b9 100644
--- a/editmode.ts
+++ b/editor/editmode.ts
@@ -1,13 +1,13 @@
-import { clearScreen, fillRect } from "./window.ts";
+import { clearScreen, fillRect } from "../io/window.ts";
 import { codetab } from "./codetab.ts";
 import { spritetab } from "./spritetab.ts";
 import { viewsheets, page } from "./viewsheets.ts";
-import { COLOR } from "./colors.ts";
-import { mouseClick, mousePos } from "./mouse.ts";
-import { drawIcon } from "./builtins.ts";
-import { inRect } from "./util.ts";
-import { sheetsIcon, trashIcon } from "./icons.ts";
-import { SheetType, setSheet } from "./sheet.ts";
+import { COLOR } from "../data/colors.ts";
+import { mouseClick, mousePos } from "../io/mouse.ts";
+import { drawIcon } from "../runtime/builtins.ts";
+import { inRect } from "../util/util.ts";
+import { sheetsIcon, trashIcon } from "../data/icons.ts";
+import { SheetType, setSheet } from "../io/sheet.ts";
 import { nonetab } from "./nonetab.ts";
 import { maptab } from "./maptab.ts";
 
diff --git a/maptab.ts b/editor/maptab.ts
similarity index 94%
rename from maptab.ts
rename to editor/maptab.ts
index 03bd11c..335554b 100644
--- a/maptab.ts
+++ b/editor/maptab.ts
@@ -1,13 +1,11 @@
-import { clearScreen, fillRect } from "./window.ts";
-import { drawSprite, drawText } from "./builtins.ts";
-import { COLOR } from "./colors.ts";
-import { getMapSheet, getSheet, setSheet } from "./sheet.ts";
-import { M, mouseClick, mouseDown, mouseHeld, mousePos } from "./mouse.ts";
-import { drawTransparentRect, drawVoidRect, inRect, reGrid } from "./util.ts";
+import { clearScreen, fillRect } from "../io/window.ts";
+import { drawSprite, drawText, useSpritesheet } from "../runtime/builtins.ts";
+import { COLOR } from "../data/colors.ts";
+import { getMapSheet, getSheet, setSheet } from "../io/sheet.ts";
+import { M, mouseClick, mouseDown, mouseHeld, mousePos } from "../io/mouse.ts";
+import { drawTransparentRect, drawVoidRect, inRect, reGrid } from "../util/util.ts";
 import { page } from "./viewsheets.ts";
-import { useSpritesheet } from "./builtins.ts";
-import { keyPressed } from "./keyboard.ts";
-import { K } from "./keyboard.ts";
+import { keyPressed, K } from "../io/keyboard.ts";
 
 const state = {
 	selectedSpriteSheet: 0,
diff --git a/nonetab.ts b/editor/nonetab.ts
similarity index 76%
rename from nonetab.ts
rename to editor/nonetab.ts
index 3a77520..298a12c 100644
--- a/nonetab.ts
+++ b/editor/nonetab.ts
@@ -1,12 +1,11 @@
-import { clearScreen, fillRect } from "./window.ts";
-import { drawIcon, drawText } from "./builtins.ts";
-import { COLOR } from "./colors.ts";
-import { getSheet, setSheet } from "./sheet.ts";
-import { mouseClick, mousePos } from "./mouse.ts";
-import { reGridWithGap } from "./util.ts";
+import { clearScreen, fillRect } from "../io/window.ts";
+import { drawIcon, drawText, useSpritesheet } from "../runtime/builtins.ts";
+import { COLOR } from "../data/colors.ts";
+import { getSheet, setSheet } from "../io/sheet.ts";
+import { mouseClick, mousePos } from "../io/mouse.ts";
+import { reGridWithGap } from "../util/util.ts";
 import { page } from "./viewsheets.ts";
-import { useSpritesheet } from "./builtins.ts";
-import { codeIcon, mapIcon, spriteIcon } from "./icons.ts";
+import { codeIcon, mapIcon, spriteIcon } from "../data/icons.ts";
 
 const gridX = 8;
 const gridY = 40;
diff --git a/spritetab.ts b/editor/spritetab.ts
similarity index 92%
rename from spritetab.ts
rename to editor/spritetab.ts
index 2af721c..13b8ab1 100644
--- a/spritetab.ts
+++ b/editor/spritetab.ts
@@ -1,11 +1,10 @@
-import { clearScreen, fillRect } from "./window.ts";
-import { drawSprite, drawText } from "./builtins.ts";
-import { COLOR } from "./colors.ts";
-import { getSpriteSheet, setSheet } from "./sheet.ts";
-import { mouseClick, mouseHeld, mousePos } from "./mouse.ts";
-import { drawTransparentRect, inRect, outlineRect, reGrid } from "./util.ts";
+import { clearScreen, fillRect } from "../io/window.ts";
+import { drawSprite, drawText, useSpritesheet } from "../runtime/builtins.ts";
+import { COLOR } from "../data/colors.ts";
+import { getSpriteSheet, setSheet } from "../io/sheet.ts";
+import { mouseClick, mouseHeld, mousePos } from "../io/mouse.ts";
+import { drawTransparentRect, inRect, outlineRect, reGrid } from "../util/util.ts";
 import { page } from "./viewsheets.ts";
-import { useSpritesheet } from "./builtins.ts";
 
 const state = {
 	selectedSprite: 0,
diff --git a/viewsheets.ts b/editor/viewsheets.ts
similarity index 72%
rename from viewsheets.ts
rename to editor/viewsheets.ts
index c4ec240..7b88923 100644
--- a/viewsheets.ts
+++ b/editor/viewsheets.ts
@@ -1,12 +1,12 @@
-import { clearScreen, fillRect } from "./window.ts";
-import { drawIcon, drawText } from "./builtins.ts";
-import { COLOR } from "./colors.ts";
-import { getSheet } from "./sheet.ts";
-import { mouseClick, mousePos } from "./mouse.ts";
-import { getCart } from "./cart.ts";
-import { font } from "./font.ts";
-import { codeIcon, spriteIcon, mapIcon } from "./icons.ts";
-import { reGridWithGap } from "./util.ts";
+import { clearScreen, fillRect } from "../io/window.ts";
+import { drawIcon, drawText } from "../runtime/builtins.ts";
+import { COLOR } from "../data/colors.ts";
+import { getSheet } from "../io/sheet.ts";
+import { mouseClick, mousePos } from "../io/mouse.ts";
+import { getCart } from "../io/cart.ts";
+import { font } from "../data/font.ts";
+import { codeIcon, spriteIcon, mapIcon } from "../data/icons.ts";
+import { reGridWithGap } from "../util/util.ts";
 
 const fontHeight = font.height;
 
diff --git a/index.ts b/index.ts
index b8c0907..3121900 100644
--- a/index.ts
+++ b/index.ts
@@ -2,15 +2,15 @@ import {
 	mainloop,
 	frame,
 	clearScreen,
-} from "./window.ts";
-import { runCode } from "./runcode.ts";
-import { getCodeSheet } from "./sheet.ts";
-import { refreshKeyboard, keyPressed, K } from "./keyboard.ts";
-import { repl, resetRepl } from "./repl.ts";
-import { addToContext } from "./runcode.ts";
-import { editmode } from "./editmode.ts";
-import { refreshMouse } from "./mouse.ts";
-import { camera } from "./builtins.ts";
+} from "./io/window.ts";
+import { runCode } from "./runtime/runcode.ts";
+import { getCodeSheet } from "./io/sheet.ts";
+import { refreshKeyboard, keyPressed, K } from "./io/keyboard.ts";
+import { repl, resetRepl } from "./repl/repl.ts";
+import { addToContext } from "./runtime/runcode.ts";
+import { editmode } from "./editor/editmode.ts";
+import { refreshMouse } from "./io/mouse.ts";
+import { camera } from "./runtime/builtins.ts";
 
 // deno-lint-ignore no-explicit-any
 let game: any = null;
diff --git a/cart.ts b/io/cart.ts
similarity index 86%
rename from cart.ts
rename to io/cart.ts
index d12eab2..52970d6 100644
--- a/cart.ts
+++ b/io/cart.ts
@@ -1,5 +1,5 @@
-import { path } from "./deps.ts";
-import initialCart from "./initialCart.json" assert { type: "json" };
+import { path } from "../deps.ts";
+import initialCart from "../data/initialCart.json" assert { type: "json" };
 import { Sheet } from "./sheet.ts";
 
 const extension = ".faux";
diff --git a/keyboard.ts b/io/keyboard.ts
similarity index 98%
rename from keyboard.ts
rename to io/keyboard.ts
index 023d414..2b67043 100644
--- a/keyboard.ts
+++ b/io/keyboard.ts
@@ -1,4 +1,4 @@
-import { font, CHAR } from "./font.ts";
+import { font, CHAR } from "../data/font.ts";
 
 const keyboard = new Map<number, {first: boolean, repeat: boolean, held: boolean}>();
 
diff --git a/mouse.ts b/io/mouse.ts
similarity index 100%
rename from mouse.ts
rename to io/mouse.ts
diff --git a/sheet.ts b/io/sheet.ts
similarity index 96%
rename from sheet.ts
rename to io/sheet.ts
index 692ba6e..53ef42f 100644
--- a/sheet.ts
+++ b/io/sheet.ts
@@ -1,5 +1,5 @@
 import { getCart } from "./cart.ts";
-import { LinearGrid } from "./util.ts";
+import { LinearGrid } from "../util/util.ts";
 // import { runCode, addToContext } from "./runcode.ts";
 
 // "code" | "spritesheet" | "map" | "sfx" | "patterns" | "fonts"
diff --git a/window.ts b/io/window.ts
similarity index 98%
rename from window.ts
rename to io/window.ts
index c6dda74..8df9c53 100644
--- a/window.ts
+++ b/io/window.ts
@@ -2,9 +2,9 @@ import {
 	createWindow,
 	getProcAddress,
 	gl,
-} from "./deps.ts";
-export {mainloop} from "./deps.ts";
-import { COLOR, palette } from "./colors.ts";
+} from "../deps.ts";
+export {mainloop} from "../deps.ts";
+import { COLOR, palette } from "../data/colors.ts";
 
 export const gameWindow = createWindow({
 	title: "Faux",
diff --git a/repl.ts b/repl/repl.ts
similarity index 90%
rename from repl.ts
rename to repl/repl.ts
index 1c707a7..a75c974 100644
--- a/repl.ts
+++ b/repl/repl.ts
@@ -1,9 +1,9 @@
-import { drawText} from "./builtins.ts";
-import { getKeysPressed, shiftKeyDown, shiftMap, K } from "./keyboard.ts";
-import { font } from "./font.ts";
-import { addToContext, evalCode } from "./runcode.ts";
-import { clearScreen, fillRect } from "./window.ts";
-import { COLOR } from "./colors.ts";
+import { drawText} from "../runtime/builtins.ts";
+import { getKeysPressed, shiftKeyDown, shiftMap, K } from "../io/keyboard.ts";
+import { font } from "../data/font.ts";
+import { addToContext, evalCode } from "../runtime/runcode.ts";
+import { clearScreen, fillRect } from "../io/window.ts";
+import { COLOR } from "../data/colors.ts";
 
 const lineHeight = 6;
 
diff --git a/builtins.ts b/runtime/builtins.ts
similarity index 91%
rename from builtins.ts
rename to runtime/builtins.ts
index 2830aab..0b7cdcb 100644
--- a/builtins.ts
+++ b/runtime/builtins.ts
@@ -8,15 +8,15 @@ outlineCircle,
 fillEllipse,
 outlineEllipse,
 setPixelColor,
-} from "./window.ts";
-import { CHAR, Font, font } from "./font.ts";
-import { K, keyDown, keyPressed, keyReleased } from "./keyboard.ts";
+} from "../io/window.ts";
+import { CHAR, Font, font } from "../data/font.ts";
+import { K, keyDown, keyPressed, keyReleased } from "../io/keyboard.ts";
 import { addToContext, runCode } from "./runcode.ts";
-import { resetRepl } from "./repl.ts";
-import { COLOR } from "./colors.ts";
-import { getSheet, getCodeSheet, getMapSheet } from "./sheet.ts";
-import { saveCart, loadCart } from "./cart.ts";
-import { outlineRect } from "./util.ts";
+import { resetRepl } from "../repl/repl.ts";
+import { COLOR } from "../data/colors.ts";
+import { getSheet, getCodeSheet, getMapSheet } from "../io/sheet.ts";
+import { saveCart, loadCart } from "../io/cart.ts";
+import { outlineRect } from "../util/util.ts";
 
 let spritesheet: number | null = null;
 
diff --git a/runcode.ts b/runtime/runcode.ts
similarity index 100%
rename from runcode.ts
rename to runtime/runcode.ts
diff --git a/util.ts b/util/util.ts
similarity index 96%
rename from util.ts
rename to util/util.ts
index 1b5043a..7504c2c 100644
--- a/util.ts
+++ b/util/util.ts
@@ -1,5 +1,5 @@
-import { COLOR } from "./colors.ts";
-import { fillRect, setPixelColor } from "./window.ts";
+import { COLOR } from "../data/colors.ts";
+import { fillRect, setPixelColor } from "../io/window.ts";
 
 export const inRect = (x: number, y: number, rectX: number, rectY: number, rectW: number, rectH: number) => {
 	return (