Assuming 5 is average, I'm scoring this just below. It does as well as one can expect on originality and you did a fine job with the animation, but the game design is relatively ho-hum. The enemies are not various nor terribly aggressive, allowing me to dodge the majority of them. I think I changed 'polarity' twice when dealing with them. The bosses were sad in similar ways. The choice of attack was minimalist, allowing me most often to sit still and just change according to what they fire, which was always a predictable 'red-blue-red-blue' pattern. I felt no sense of concern or danger anywhere in the game.
As for the weaponry, it was somewhere between fair and pointless. The shielding was an okay idea, but never needed it. The pendulum thing was weird and made a difference once in the entire game (largely because I was stupid enough to corner myself). The missiles were excellent, but I would be disappointed in a shooter without them. The sweeping laser was hit and miss, with varying moments of usefulness.
All in all, a cute idea lacking the energy or complexity to become a great idea.