I beat both the regular mode and the boss rush. Fun and very well presented. The art is especially cool. I give it high marks in everything, but then we come to level design... 75% or more of the screen is completely blocked off by some hazard at all times, and I don't mean bullets. Whether it is is a building blocking shots, a line of enemies that you didn't speedkill, or the chance of an enemy appearing from the sides or back (big design no-no), you end up limited to a very small part of the screen. For that reason the bosses are the most fun and fair part. Definitely a strong foundation that some better levels could be built on.