Very fun game. Quite easy, beat it first try, ending the game with full HP, but a fun experience anyways.
The napalm is so good at destroying hordes, and my 8 aux cannons were able to clean up.
I think there may be too many bombs given for napalm. I could just use them all any time I felt the slightest bit threatened, and clean up the entire problem.
Also, maybe something telling you when you get a special event, because I couldn't really feel if the two event-boosting upgrades were doing anything, since I couldn't tell the difference between a regular event, a good event, or a special event.