Really enjoyed this, might have gotten a little bit into it and played for 157 minigames before stopping urm.
Anyway, very fun game. You got a good general game feel (though how much the controls switch around can feel a bit weird especially with the mouse and backspace) and a cool style going. The audio also works well and especially hearing that completion sound is very satisfying which is important in these games duh. I also really like that you made each game be a unique interpretation of the theme. I'm rambling a bit but yes, very fun game.
My only notes (that looking here others have also said) are instruction text could be on screen longer and the difficulty should increase over time. But yea, good job.