Boingo is a brickbreaker-rougelike which uses a pixel art style and the game is set in a cave its really fun just playing around and trying to find good or overpowered builds! ... 

you have a main ball and you can shoot it! it bounces off of walls and enemys. There are a lot of main balls,16 unlockable balls to be more specific,each one different!

When a your main ball bounces off of enemys it damages them you get money when you do,there are a lot of enemys and bosses all looking different but in the same blocky style

buy things with the money you gain. Buying upgrades will make you overpowered,There are over a 140 upgrades total and a lot of different synergys beetween them,also you get a lot of different upgrades in a run,each cool and fun,they do stuff like make you emit a flame when you bounce or a turret!

Thats basicly it,the game is a lot of fun tho...