Note - IF YOU DON'T SEE THE WALLS YOU NEED TO ZOOM OUT OF THE WEB-PAGE.
This is a game that you have to sacrifice your weapon to swap it. So you will drop your old weapon for the new one. This is basically dungeon rogue-like that is not procedural generated.
W - Move Up Space - Interact
S - Move Down Click - Shoot
A - Move Left
D - Move Right