A highly enjoyable game that is really solid; I really had a good time with this one.
The UI is well-handled (there was definite potential for bugs with those papers, but I did not encounter any), the puzzles are tricky but satisfying once you understand them and overall it was a solid, fun experience.
I appreciated the subtle music layering as time gradually got closer to 0, and by the time I beat the level (I think 6th attempt), I was using the music over the timer to assess how long I had left (roughly).
I agree with Memmery, I thought the balance of difficulty and time was pretty good. I personally didn't mind failing the first couple of times because I was building up an understanding of the logic which empowered me for subsequent playthroughs.
Congratulations on entering and submitting this excellent submission!