Neat concept! I can see this becoming a decent vampire survivors-like game in my head though it may go a different route too.
I couldn't tell if the increased size increased the health of the parasites, so it could be worth highlighting that with UI if that is the case. The projectiles seem to travel varying distances from what I could see, as it would sometimes travel far and other times stop short which might be worth looking at.
Other than that it's probably just going to be UI, indicators etc which I'm realizing was due to the time limit, but great job on getting this out in that time!
Best wishes on the project! :))