Definitely a cool concept! I think the biggest problem is the cooldowns, which really slow down the pace of the action. The idea of having to switch weapons really quickly could lead to some really fast-paced, frantic gameplay, so making the actual switching a lot faster and maybe giving the enemies some more varied behavior could really help to reach your experience goals, in my opinion. Also, visually, the game is really nice! I love the art, and the sound effects that are in the game work really well, but some music would really help the auditory aspect.