The sidebar isn't very useful if you can't use the objects in your game.

Any projects in the engine have access to the $get(...) function, which you can use to access any objects from the sidebar. The easiest way to do this is to right-click the object in the sidebar, and select Copy Javascript

You can then paste this into your code to use the object in your code.

You can then interact with the object directly,

$get('Tilemap::Dungeon Map').offset.x += 1;

Although if you're using the object in multiple places (which you will be almost all of the time), you should instead store it as a variable.

const dungeonMap = $get('Tilemap::Dungeon Map')

dungeonMap.offset.x += 1;

Now that you're familiar with using objects, it's time to start making your game.

Optional: Sharing objects between files

Next: The Game Loop