Controls are the same as Cave Story if you've ever played it :) You can press P to pause and see the controls, too.
You, the lone crew member on a small vessel, find a space station near the edge of explored space beaming out a distress call. As anyone would do in such a situation, you blindly investigate.
Features include multiple weapons, rocket jumping, fast physics, and a retro style.
Arrows to move and look up and down.
X or SPACE to jump
C or SHIFT to use and item you have
S and D to switch weapons
P to pause and show controls
0 to mute
-/+ to change volume