Neat idea! I enjoyed trying to figure out the best way to survive, and the vacuum mechanic feels good.
With a game like this, you wanna really focus on the juice and effects. It seems like you're going for something like antibodies, curing infections, but it feels like controlling balls in a ball pit. Moving the balls around is a lot more wacky and random than I feel it should be, but that might just be a personal opinion. If you were to take this further, I'd spent time on particle effects, atmosphere, and other elements that puts the player "in the zone".
Good stuff!