I would say this is certainly a proof of concept!
love all the polish to the visuals, animation, the shaking text effects and intro animation. The water effect looked great and so did all the bubbles, flamethrower particles, everything was really cool looking! I kind of had my fill after a a few minutes, and the gameplay felt a bit one dimensional after a while. REALLY polished and solid, but it definitely needs one or two more elements to really flesh out the game loop. I had fun and appreciated everything that went into it so far, and hope you expand on it!
If this was a food dish, I'd say it just needed a little more salt and pepper and it'd be perfect!