getTileId(x, y) {
		const tile = this.getTile(x, y);
		return tile ? tile.tileId : null;
	}
Return the TileId of the Tile at the specified position
@param {number} x - X coordinate (in world/pixels coordinates)
@param {number} y - Y coordinate (in world/pixels coordinates)
@returns {number} TileId or null if there is no Tile at the given position