Love the character designs and the way the main character feels to play (more speciffically the controls feel responsive and the way the main character maintains momentum when jumping is fun).
There are a couple of bugs I've encountered:
1. When pausing or in the game over menu items and enemies appear on the foreground
2. Pressing retry doesn't reset the score or the rate at which you recieve poison damage
On the topic of poison damage, I wish it didn't scale as agressivelly, since it quickly becomes unsurvivable. Or maybe the enemy spawn rate could have increased so you could get more Pink Monsters.