Zombusters is, in a nutshell, a boring husk of a dual-stick shooter.
There is a scrolling text introduction at the very beginning that contains whatever tidbits of plot the developers deemed meritable enough to have you plodding through 50 waves of the same enemies lumbering slowly after you in one stilted, looped animation that never changes; and it should be noted that there's actually only one enemy sprite, it's just that the color palettes were changed to mark the toughness of each wave. Each level is one still frame of boring landscape wherein you fight hundreds of zombies until you magically transport to the next still frame. Compelling, consistency, coherency, and creativeness are four "c" words that I would not use to describe this, but there's one four-letter "s" word that Zombusters is the very definition of.
I couldn't discern gameplay variations between the different characters, either. None of them have a special ability or advantage over one another, so choosing comes down to sprite preference. I also had to use the touch screen on my laptop because the aiming mechanics with mouse and keyboard felt broken to me; it felt like I could only shoot in eight directions instead of omnidirectionally as is expected from a dual-stick.
The only thing this game doesn't fall short on is soundtrack; if only they had spent as much time creating a good game instead of soliciting good indie bands, Zombusters would've turned out to be a much better game.
I MIGHT recommend it if it's free due to the soundtrack, otherwise Zombusters is a definite pass.
3/10 (4.7/10 average)