Sooo !
I recycled the old player effect, tweaked it a bit, and... voila ! 

A unique graphical effect to go along with a new bonus where you are a mimic that tries to look like the enemies chasing you. They won't spot you unless you are actively shooting

Other than that, I added a lot of new voices to go along with the existing bonuses, I do like those voices :)

And I added a white flash when you pick up xp to explain.. that you pick up xp. That's probably not enough, but that's a step in the right direction