Wow, this is such a weird but interesting theme !
It reminds me a bit of Plague Inc. with the morbid theme and the "taking over" aspect, but on the opposit end of the scale in term of size. ^^
I feel like your game would benefit from 2 main things:
- A click and Drag for placing "units" instead of having to click one by one (a bit into the game, I had to start clicking A LOT).
- Having just a bit of animation for these "units" as well, like just 2/3f would had so much life (if it's the appropriate word considering the theme :P) to the game.
I also encountered a bug after the spider spawned (I think that when the "hide larvae" ability becomes useful by the way ?), my larvaes wouldn't reappear fully. No unit would despawn after that (the flesh took damage and could disappear though).
I think it might be something with the spider's triggers or something.
Speaking of the spider, I really liked the "interruptions" from itself and especially from the crow (which you can hear like a few minutes beforehand).
It really made me feel the tiny scale of the game !
Great Job, and have a good one !