I can tell a ton of work has been put into this! The menu, the buttons and the movement feel really good. I love the music also. Here's some more feedback:
- It's kind of tricky to place blocks with a moving camera, maybe you could try making levels with a fixed camera, or alleviating it some other way like slow-mo or freezing?
- It would help to make the player always face the same direction when spawning, it kind of distracts the player when it doesn't start out the same the second time
- The difficulty curve is pretty rough, but that's to be expected from a jam game and you even mentioned it in the description
For a second game ever this is really awesome. Fantastic work! Großartig!