Very nice game! I really enjoyed figuring out the puzzles. The balance of simple instructive levels and harder levels was very well done.
I kept forgetting that the thin blue ones could be rotated too, which made some levels way harder, lol.
At some point, I got annoyed with the slow speed at which the sound had to move through the bigger levels. Later, I figured out what the top slider was for.
If I had to change something, I would make it so that the orientation of the blocks remained the same after a failure. Setting up all the blocks, then forgetting to rotate the player and immediately failing, and then having to set up all the blocks again was a bit of a pain.
I contrast to what some others said, I think it was nice that some levels had unnecessary blocks, so that figuring out which blocks to use was part of the puzzle. However, a few levels had bigger sections of the map consisting of blocks that weren't used (for example the last level), which felt a bit dull, but not terrible
All in all, great game!