I really dig this concept! Playing with keyboard and mouse is a little disorientating though because the game wants to snap to centering on the player, but every time you move the mouse, the camera snaps to a middle point between the player and mouse cursor. Makes aiming very difficult XD
Switching up the twin stick shooter concept with randomizing your weapon every time you take damage is super cool though! I also really like the art style you have going on here.