I really like the visuals you did with the shading of the petri dish, the paralax effect and layering of all the floaters.
all the floaty stuff looked really cool and realistic moving. you set a really cool atmosphere in my opinion.
I think the healthsystem is a bit broken or i didnt fully grasp it. The first level i didnt really read the tutorial and didnt know what to do and where just roaming around collecting floaters. at one point i had 120/30 health and then i started doing the objectives. the second level i started with 0/30 hp but i think hp carried over from the first level, because i was pretty much not losing hp or dying when touching enemies so i was just plowing from arrow to arrow without avoiding anything, which made the game a bit trivial. then on the fourth level i instantly died after touching the first enemy, so i wasnt invincible after all.
Other than that a really fun idea.