I like it. Very clever and makes me use my head in an unfamiliar way. Also art is cute and music is calming.
I struggled with movement a lot. Often times I unintentionally moved too far. One time on the undercut level I moved into a block from the left but the block moved down making me restart the level. I think if everything was on a grid with squares the size of your character things would be fixed. The bookmark thing was cute in retrospect, but I don't want to be messing around with my computer so I'm not completing the 9th level.