I'm pretty impressed. Trying to make a puzzle game always seemed daunting to me, but the mechanic here is pretty clever. Also a surprising amount of levels/ mechanics given the time frame! Good job!
Interestingly puzzles seemed like the easiest route to me given the time constraints, since once you have the mechanic you just need to make levels to iterate on it, vs something more open ended where I feel like the time crunch becomes more obvious
