Nice artwork, and sound. It reminds me of an old Atari style game. I found the movement a little floaty for my tastes, but was able to move around alright. I like how you have room views, and larger (multi-room) views; it breaks up the gameplay in a pleasant way. One thing I would change is the sensitivity of the shield that repels enemy bullets; instead of letting it face any direction, make it only able to face in 8 directions. Good work on making a playable game.