I also suggest a thing where you can edit the font of the game when playing. There are two different options:
Only effect one: choose the one you want to change. (You can change more than one.)
Change all: changes the whole font to whatever you selected.
Also boxes move one tile at a time, it looks kinda chunky so I suggest making it move smoother.
Also add moving parts, rotating parts. You can adjust where the move part is going to go and a rotating parts pivot point.
Also add spheres.
Oh, and one last thing: boxes should have actual physics along with spheres. If a box tips on its edge it should rotate around like a real box.
Anyways enjoy your game dev 😉