Thanks for playing!
Im glad you liked the game. Yeah,right now when you win you litterally just get that "you won" message , soon there will be a proper game end. You can get lenses from the eye-monsters.
I have killed a dozen or so, so far, but only just today got my first lens.... perhaps i am too far from them when they die?
But i would put that as a playstyle thing, having the permanent storage persist from game to game, that i would say is my only major issue.