The arts and vibes of the game are so great, my only caviat is that most of the pixels doesen't have a regular size, but don't get discouraged, you managed to make it look stunning anyways!
For the gameplay, don't know if I get so lucky but I haven't found any enemy to shoot with the ship. The game loop though it's so original, addictive and fun. I think is one of the best things of the game. You did a great job there :}