Loved the characters, they are cute! The sound effect too!
The game is too hard, my max score is 78. I would have like to play longer. Maybe make the game very easy at the beginning then increase the difficulty slowly.
The penalty mechanic is here for the theme, but I think you should consider removing it if you continue the game post-jam. It make the game overcomplicated, the game would be more fluid without it.
With more rooms I can see the potential for a cool speed based game.