This is a really fun puzzle platformer with a novel concept. I always like seeing games with simple and immediately intuitive controls, and the drag-to-create boxes and click-in-a-direction inputs feel great from the start.
After playing for a bit, i figured i could draw boxes somewhat inside my character to make a stack underneath me. It also seems like the jump detection works on walls as well as floors, so you can do some fun techs with that. I think this could also make a fun Foddian platformer (a la Getting Over It, Jump King , etc).
Great work!