fix: account for tilePos.x getting out of the level boundary

CHANGELOG.md

@@ -137,6 +137,8 @@ So your change should look like:
   `drawSprite` (#1026) - @benhuangbmj
 - Fixed `onClick()` and `onCollide()` tag variants no longer working -
   @mflerackers
+- Fixed `levelComp.getAt` to account for `tilePos.x` getting outside of the
+  level boundary - @benhuangbmj
 - Fixed `destroy()` messing up enumeration during `update()` and
   `fixedUpdate()`, thanks to @imaginarny for helping to find the cause -
   @mflerackers

src/ecs/components/level/level.ts

@@ -476,6 +476,7 @@ export function level(map: string[], opt: LevelCompOpt): LevelComp {
             if (!spatialMap) {
                 createSpatialMap(this);
             }
+            if (tilePos.x >= numColumns || tilePos.x < 0) return [];
             const hash = tile2Hash(tilePos);
             return spatialMap![hash] || [];
         },