Barely a game at all. The stages take a minute to beat and a lot of that time is waiting on enemies to spawn in designated "kill all enemies" areas.
The entire purpose is to collect various upgrade materials to upgrade your characters/weapons/armor/cards/chips to beat the more "challenging" stages that only up the damage/defense of enemies.
Partial controller support. Using the mouse for menus isn't mandatory, but you'll spend forever trying to use the right thumbstick.

The real issue is: the gameplay isn't fun.
You can't even rapid fire lemons with the base x-buster. You get around 50 shots before it has to reload.

Game has robot in it.

i like roll and protoman's models in this game