I see potential here! Some feedback:
- As somebody said, I would "punish" the user more for losing, either blocking the same with a gameover screen or showing a longer death animation
- I would "reward" the user more for winning, either with a dedicated animation or some text with particles
- I would have focused on 3 mini-games instead of 5 to have more time to do the stuff above
Some more details:
- I would change the font of the body text in the main menu to a more classic Roboto, so that it's easier to read the instructions about the mini game
- I would add a screenshot of the mini game in the main menu to make it more enticing to click on a mini game
Keep it up this is a good start!