Well, there's basically two types of weapons, swords and guns with swords typically attacking once per turn and guns attacking multiple times per turn.
By the end of the game, aside from the occasional healing, the other ally is pretty damn useless dealing like 4 damage to enemies.
There was a brief mention in the readme, but this game is like a 4th entry in the Space Sheriff trilogy, which was part of the Metal Heroes live action TV series in Japan. Footage from the original series was used in VR Troopers and Beetleborgs for those of us stateside etc. I do recall watching those cheesy shows along with Power Rangers when I was a little kid. So it's more of that.
Also one other thing that should be mentioned is that I enjoyed the music very much and some of the bosses even have their own themes.