well... I have some ideas
1:debug menu. I personally like to give myself op states. Can be unlocked only after completing full walk through
2:futa. It goes wild with worms and stuff. Can be only unlocked when a special insect bite you
3:non penetration scenes. Maybe add a scene where the enemy will just seduce you. Maybe a spider will wrap you in webs. Maybe something toys with you. Or something for upper body
4:plants. I mean come on we are at jungle add tentacles and stuff. We already have 1 parasite plant
5:(personal thought) tickling? You cant just let flys pin someone like that and expect me not to think about it
6:poisons. Bee can sting making you dizzy. Spiders can probably paralyze. Mosquitos itch increasing lust or makes you fail attack mid-battle
7:more nipple stuff there is literally one scene with leachs
8:more humans but can interact with us instead of just other bugs (specially if you will add futa)
9:crazed state. If too over stimulated. She just starts to let all bugs do whatever they want