Hey, I think there's a lot of potential in this idea, I actually had a lot of fun messing around with it! There's almost a push-your-luck element to how far you go with the shooting combos. I think if you made some hand-crafted levels you'd be surprised at how much this game could come alive.
Feel free to check out our game too! https://itch.io/jam/gmtk-2019/rate/463168?after=20#post-876146