Move the mouse to aim. Left click to shoot and interact with objects. Spacebar to charge up an energy burst. There is also a secret control mechanism that can only be used in a certain place.
The final version of my first Scratch project! Please do not remix without permission. Setting: You are working security aboard the space station designated 0192-X, when you are called to respond to a disturbance on the maintenance level. Credits: Every sprite and script in the game was made by me, even though it says this is a remix; all sounds/music are from Half-Life and Team Fortress 2.