Nice game. It took a bit to get used to the controls, but after a while it became easier.
Thanks a lot for playing my game! Did you try the second level ? The gameplay is actually quite different :)
Yes, but I did it after playing level 4. I was confused how the math objects worked because I skipped level 2. After level 2 I found it was my fault for skipping 2 levels. It is great that the game is playable with one key (any key).