Very cool and fun! Satisfying to watch when there is hundreds of balls destroying the void.
Some comments:
- It would be great if escape removed the selected node, or it deselected automatically after placing a single one.
- The initially selected level should be the tutorial. I launched the game and I think it must have been on random or something I was very confused. This would also be better by clicking the level launching that level not changing what the start game functionality is.