Interesting concept. I like the focus on exploration but I feel like there should have been more indication of what was explorable and what wasn't. I like the movement system it feels weighty and would definitely work in a platformer. But I have a problem with the controls, having B for the boost control is very unintuitive, and I couldn't figure out how to use it on the jump after getting it.
I also feel like the dialogue was very intrusive and didn't need to pop up every time I respawned.