An interesting game. Has great polish (sound, art; visual and audio feedback for player input). Implements two button diversifier in the most pure way, where buttons only have 2 actions no matter what (even UI is done with the same system).
Didn't notice any checkpoints and game seemed to end abruptly as the timer was exhausted and "Summer" was being displayed, at which point back to main menu, which is unfortunate. Maybe I just didn't understand, what has to be done, correctly.