The core mechanic is really cool and it is super well integrated with the concept. However the key response on the jump key is a bit slow, and the relationship and timing between the mc and the shadow is a bit hard to get. For example, I managed to get the shadow move up the cliff by being on top of the box while the mc kicked the box, but found out that the merge only happened on the mc's side. So I tried the other way around (mc on top of the box while shadow kicking the box) but it didn't seem to work. There is a lot of potential in this game and it just needs some polishing on the controls.