Sorry i didn't figure out what is going on... even make various attempts. But now seeing the response below at Kevin Hill comment, i now understand it.
So in puzzle games it is better to start with very easy level, just to make the player understand the mechanics. And i think the other thing that can i suggest is more sfx or music or both..
Anyways, well done, it's rare to see some "pure" puzzle games at jams, it always adventure thing and etc...