I appreciated this game. I admit that it got kind of redundant. It was just the same screen over and over. I still appreciate how there were different enemies. I think they all took the same damage, though. Some of them probably moved faster.
The music was nice and cheery too. There should have been explosion sounds. I think the only sounds were the music. The powerups were quite good. I'm not sure if you can have more than three of those guys on screen at once.