Switch from characters to numerical tile IDs

src/model/data/MapData.ts

@@ -1,21 +1,21 @@
 import {mapFromObject} from '../../util';
 
 interface Input {
-	readonly tiles: {[key: string]: string};
-	readonly collision: string[];
-	readonly layers: string[][][];
+	readonly tiles: string[];
+	readonly collision: boolean[][];
+	readonly layers: number[][][];
 }
 
 export default class MapData {
-	public readonly tiles: Map<string, string>;
-	public readonly collision: string[];
-	public readonly layers: string[][][];
+	public readonly tiles: string[];
+	public readonly collision: boolean[][];
+	public readonly layers: number[][][];
 
 	public readonly width: number;
 	public readonly height: number;
 
 	constructor(data: Input) {
-		this.tiles = mapFromObject(data.tiles);
+		this.tiles = data.tiles;
 		this.collision = data.collision;
 		this.layers = data.layers;