Very much enjoyed this! Some nuggets of good puzzle design in there. It's truly impressive how many levels you managed to include for such a short jam! I got a little frustrated further in; I struggled to execute the solutions I'd come up with.
One of the bigger issues was accidentally pushing blocks too far/when I didn't want to. Maybe you should have to hold a button to push? The darker walls also confused me at first, maybe add a puzzle in before they're first used to demonstrate the concept.
Great work! Keep it up ^-^