So fun! I really love the puzzles here, the difficulty curves were well thought and very distinct between each levels! I can't give any feedback as this is very polished IMO, but I did encounter some bugs while playing so I'll just leave a comment here for you to note when you are updating the game. Nice Game! I really look forward for levels in the future, when multiplication comes in.
Bug: Rapidly selecting multiple levels during the loading transition causes overlapping BGM and broken UI flow/state.
Reproduce
1.Navigate to the Level Selection screen (ensure at least Level 1 and Level 2 are unlocked).
2.Click Level 1.
3.While the transition/loading process is active, immediately click Level 2.
4.Observe the audio and then attempt to return to the selection screen.