it should be op, as it gets more and more expensive with every use. but the problem is it doesnt give that massive damage for it to be carry in usual waves. if level is fast with a lot of dangerous enemies in first 3 waves it is better not to use it.
a bit too complicated, why do you need bobby then? maybe then add some more (unlockable) babies so you can create yourself a deck, or just make defence and support babies be random
if theire hp will be lessed they will die in first 2 tiles or just destroy the lane completely like they do now. The problem is in flight exactly. It needs to be more limited, not just flying over everything while also being invincible
Red Flies are just too overpowered for a regular enemy that spawns more than one time in a wave. You just cant react over everything and you will garanteed lose at least one dodger, even if your conditions to kill it were pretty good.