On the screen, I didn't know whether it meant click Enter or click the actual "Enter". It was the latter. This is another game where it doesn't load while you go offscreen. Anyway, this was a good game. Those enemies seemed to get stronger. Originally, it was just about getting the powerups.
It then started to be more about shooting the enemies. The sound effects were pretty good. I found the setting to be fairly original. I don't know why these things are raining down, though. While not too memorable, I would check this out.