Very cool concept ! Love your visuals and the vaiety in monsters.
I would be curious to see what you could have done with it if you had more time.
Few feedbacks & ideas If you decide to iterate on it after the jam :
- Healthbars on the monster (especially on the one you control so you can know when it's worth it to explode it)
- Make the larva faster or give it a dash so you can sneak into monster more easily.
- avoid friendly fire between monsters (if it works on collission you can disable collision on same objects layers in the projects settings > 2d physics
- make the enemies come in waves so you can manage them more easily
- maybe a minimap or a kind of indicator to locate the monsters more easily without having to search the whole room
All in all, it's really good for a first jam. with a bit more time & polishing, it can become a really fun game. keep going a it :)