Decent entry. I collected three of the five key pieces and what I think are all the main abilities, but didn't feel up to scouring the map for the others. The visuals and level design are certainly minimalist, but maybe to a fault - there seem to be a lot of empty hub rooms and long confusingly windy hallways with no good landmarks to distinguish them, and it made navigation just really confusing. I also had trouble gauging the depth of objects, especially the enemies and my own projectiles, which I think was probably exacerbated by the visuals since all the perfectly flat walls and fog lead to a near complete lack of reference points to gauge depth from.
The actual upgrades themselves were fun enough, the concept of an antigravity field instead of a jump is cool, and the sticky bombs were pretty satisfying to use when I wasn't blowing myself up thanks to the aforementioned lack of depth perception. I found the stamina system for the skills to be mostly just an annoyance rather than a meaningful limitation, though.