sounds, atmosphere and concept are all really good. Game play personally enjoyed though the way items drop needs to be made clear. Does every x amount of enemies slain drop an item or by luck? Is there an ending? Difficulty with enemies is usually luck based which is this game's worst aspect won't lie.
Another critique comes from how each run pretty much gives you a choice: Die and pay more currency or restart the run.. and pay currency for retreating. This one we are less pushy with since this is clearly the intended gameplay loop which forces you to try and hunt more enemies and get lucky so you don't have to pay too much debt.
All around a good game 8.6/10 personally.