There are no instructions for each minigame - how to play, objective or controls. Yes, there something in the options, but if you don't go there you don't know.
In the hydraulic game the action key stopped working after I fixed the first hole.
And that horizontally scrolling orange striped background is just evil. The game you play after that appears to be shifting sideways even though it's not.
But, I like the number and variety of the minigames. Well done with your submission.