This is a really interesting concept! The inertial movement really fits the space setting, and the goes well with your chosen theme. I found that the controls didn't quite behave in the way I was expecting them to sometimes, especially at the corners of wall. I did find exploring with this movement system to be quite frustrating, though. I would often attempt to move in a direction and end up overshooting, then have to wait quite a while before I hit something and was able to reset myself. And there were even sections where I just threw myself into the cold dark of space for eternity and had to restart the whole game. Adding in a checkpoint system and some limited way to affect your movement once you get going would go a long way towards alleviating this frustration. This is a really cool start, and certainly an incredibly unique concept, so I am excited to see how it evolves from here!