Some slight refactoring

sheet.ts

@@ -1,4 +1,5 @@
 import { getCart } from "./cart.ts";
+import { LinearGrid } from "./util.ts";
 // import { runCode, addToContext } from "./runcode.ts";
 
 // "code" | "spritesheet" | "map" | "sfx" | "patterns" | "fonts"
@@ -50,5 +51,5 @@ export const getMapSheet = (sheet: number) => {
 	if (sheet_type !== "map") {
 		throw "Trying to use a non-map sheet as a map."
 	}
-	return value;
+	return LinearGrid(value, 64);
 }