This is a very strong entree regarding the game mechanics. What I really like is how strongly defined the game is in its options and the power-ups you can get in each level. What I like even more and what I would love to see more is more establishing of these mechanics and more importantly twist these mechanics on their head for new and clever ways to solve the puzzles.
The art style give me strong Portal vibes and I do wish you would have focused more on that.
I think this is an extremely strong prototype and I hope you would make this in a proper game. Focus less on the shooting/tight timing mechanics. And focus more on the puzzle and game mechanics, because twisting these game mechanics really are a ton of fun.