Super cool gameplay concept with the phasing, has a ton of potential for all sorts of physics and speedrun-type shenanigans. There's a lot of potential for skips since you can phase through geometry and boost on any platform. Once you learn that you can hold jump right before leaving platform on a phase boost to gain extra height, there's even more parts you can skip through (probably a glitch? but great either way). I imagine if I was better I feel like I could chain boosts together to fly through the levels. Either way the potential has me pretty excited.
General feedback, I do think Bobby feels very floaty in the air as of now, there's not a lot of air control. This can be particularly punishing with the current level design as boost trajectories can be unpredictable and death makes you restart from the start. Having a trajectory arrow for boosts could also help with that. To my understanding the trajectory is mainly influenced by the player's position relative to the wall; making trajectory changes based off of what direction the player is holding may also add increased sense of control for the phase boosts.
Mechanics have a ton of potential though, would love to see a full release.
ps keep the jump phase boost glitch its a lot of fun lol