Hey, I really like your game! It could easily be a full indie title on Steam. However I encountered a small bug (or a hidden mechanic :P). I found out that if you are 1) standing right at the edge of the map such that you can't move left and 2) press firstly the left arrow and then the down arrow, you can move to the part of the map that should be inacessible. The same thing works with right edge and right arrow. I think it's easiest to see on the fourth puzzle. I took a screenshot of it. Hope you find this useful!