Since it takes into account range, defensive capabitily, weapon type and movement is an intuitive manner. Most simple games I see tend to give a short shrift to one or more of these factors. They are fired at minimum of 3 hex range and hit on target destroying it if a two dice roll is greater than or equal to the range. If missed, the blast occurs one hex away in a random direction. Their big advantage is they fire and can kill the bugs before the bugs can attack.
Big disadvantage is that that once dead, there is no reinforcement.
The game is presented in Programmed Instruction format. The rules are pretty straight forward and well presented should make the game accessible to non-gamers. Terrain with line of sight and elevation differences. All troopers and bugs have a plastic stand. They show a silhouette on the back back, so the pieces can be rotated to show which pieces have moved or fired.