Desing a sounds (equal as with music) was a great pleause, cause i love work with audio :)
Hit feedback in shot sound is good idea and not silly at all. I did same in sound "enemy damage you" like whoosh+hit+ouch, but the needle must cut through the air, because the sound has a small tail. And if we had a choice between needle tail (topic item) and monsters pain sound - we have chosen impove topic item sound :)