Great stuff! This has a lot of potential imo, the mechanics are sloppy but that’s expected from a short jam.
The atmosphere is also very relaxing and I think if the mechanics matched that a little more it would be a really great game!
The rotation of the pieces was awkward, a slight misinput that makes the piece collide with ground would make the piece spin and hard to control. This could be fixed by giving the player better control of the spin or easing the spin into a halt very quickly after removed from collision.
Dropping a key-piece and it infinitely falling through the level could be fixed by just giving them a static position to come back to if they fall. Maybe a piece inventory UI?
That’s all, I hope to see an update to this!