Love the concept! The art and music are both fantastic as well, the whole vibe is great. I did however find a way to exploit and survive for an infinite amount of time. If you just hold left or right you get stuck on the edge and dodge all the stuff, you can even jump there even though you're not on anything. I'm pretty sure it can be fixed by using a Physics Material2D with 0 friction on the player.
Overall though I loved it!