Pretty simple, but nicely executed concept. The arts is again very simple, yet thanks to the art direction, looks quite good. The audio is simple but I like it.
The gameplay was really slow at first. For such an easy game ( for like 95% of it), being too slow is just too boring. Like others have said, the best way to play is just kill your ships as much as possible, before you get to the good stuffs. Which is exactly what I did, in my first run, then I just rided it out in the second run.