I liked this one quite a lot! The idea of two characters constrained to different planes was cool. I particularly liked when the two different "spaces" intersected, so the characters had to use each other as walls / platforms. Like others have said, the movement feels clunky - I think because they accelerate slowly when you start moving, so they feel very heavy and sluggish, but they stop instantly when you release the key. For this kind of puzzle game, I think starting and stopping should both be instant. Also, the audio sounded like it was playing too loud so it was clipping.