That was really interesting, but I played through the whole thing not fully understanding what I was doing lol. There seem to be a lot of mechanics going on in the background, but it's not immediately obvious how they all work. The ghost character seems to be related to whether you phase through walls or not, and their movement seems to be connected to the size of the circle, which seems to be connected to your built up momentum..?
Idk, it was confusing, but I actually really enjoyed it. The grappling hook is an awesome mechanic, if a bit buggy at times. I would love to play a more fleshed out version of this, so I definitely think you should keep working on it. There's a lot of potential here for sure!