Spectro Destroyer is a Puzzle-Platformer with a retro 8-bit look containing a Level Editor too. You are in a alien base and you have to pass through all the rooms. To make this you need to kill all the enemies in each room. Each enemy has a color and can be destroyed only with a Laser-Bullet of the same color. So you will have to shoot on the colored mirrors in the room to transform the color of your laser from white to whatever other color you need.
Move it with WAD or Arrows. Shoot with the mouse. To kill a green monster shoot a green mirror and the bounce will kill it.