Fun game! I included it in my compilation video series of all of the GBJam 5 games, if you'd like to take a look :)

Good job. Like the previous comment says, the slowdown makes it somewhat too easy and the game feels too fast once you get used to the slowdown for a while. It would also help if you were able to see a bit more of the game world.

The time slowdown mechanic is pretty cool, with the slowed down sfx and everything! I wish that it was better integrated with the gameplay though. Right now it seems like the optimal way to play would be slowed down the whole time, but that just gets too boring. Overall nice gameplay though!