Hi Gr0n! I'm coming over from Discord after seeing your submission. :) I gave it about 20 minutes; I like the idea a lot. As far as feedback, I don't have much to add to the other posters other than one thing that stood out to me in my experience. That one thing was just the counter-intuitiveness of everything when I first started. I didn't realize how different blocks or the game loop worked until after I had just played with things and failed for a while. Introducing players to novel mechanics like this might be a good idea! That's all I have got, though!
Check out our submission for the jam as well, and let me know what you think!