1 - this is really strange - there should be particles when you hit someone
(do you see particles at all? e.g. hitting walls and such? might be a rendering bug if not 🤔)
2 - some of them do (you get batteries out of the bloops - err. 3 legged spiders, some enemies leave ammo etc)
3 - there is no ingame map sorry (it's not as easy to implement with full 3D maps 😔)
thing is the editor is a fully dev tool - it's provided as-is without support
because it's not very user friendly I'm afraid 😔
still I'm glad you liked the game 👍