UFO Invasion

UFO Invasion is a simple Space Invaders style shooting game. You move your space ship around near the bottom of the screen (you can also move it up about halfway) and shoot the aliens who slowly advance to the bottom of the screen. You need to try to shoot the lowest and fastest moving aliens first, otherwise they'll crash into you. As the levels progress, there are more aliens, they move faster, and they start lower. Not a bad game although it's pretty basic. It plays somewhat like an action strategy game because you're constantly trying to discern which alien is most critical to shoot next.