Cool game, I very much like the premise, but I agree with euclidean-whale, that the vacuum range is hard to see. I reckon the camera angle doesn't do this any favours and if it were topdown it would have been more readable.
The upgrades are neat - both the diagetic UI and that there's a nice variety, though it have been even nicer to have some changes, not just incremental upgrades (but that's way too much to ask for a jam game, I know).
I can't get behind the freeze effect - both the overlay, which gets quite annoying, but also the slow down that comes with it. To me it felt a bit unfair, because I thought I had more time/HP, but I was practically dead at that point.
Also as CelesteSystems has mentioned, I'd make the screenshake a tad less pronounced.