Fun!
I liked that a lot! It's not perfect, but it's fun! The ranking system had me trying to score higher than I did last time, which was cool. If you ever make another (which I hope you do) it would be sweet if you put in more than one map, and maybe make the enemies more fun to kill. Think about it: the higher the combo you rack up, the more blood splatters from your kills, and bigger explosions when you destroy buildings and vehicles! Look to Indestructo tank for clues. It plays better, but this is a much more enjoyable concept!