My game has three different game modes, each with their own version of the "Ten Seconds" theme.

Racing
You race from one platform to another one. You've got ten seconds between each checkpoint, make it in time or die.

Assault
In this mode you need to kill one enemy every ten seconds or you die. The goal is to kill all the enemies and then return to the platform. This mode is pretty hard as I didn't have any time left to tweak it.

Delivery Day
Go get all the red packages and bring them back to your base, one by one. You have ten seconds to find a package, then you have 10 seconds to bring it back to the main platform.

There are 3 levels / game mode.

As I'm such a nice guy you have five extra lives in each mode. :D

Controls:
Accelerate: Up Arrow, A, or Left Ctrl
Steer: Right and Left Arrow
Fire: Space, S, or Left Shift

Edit 1:
I rewrote this description after I had got some sleep. :)
Added web version.
I also uploaded a new version where I fixed two bugs
- The number of lives in the HUD didn't match reality.
- It was impossible to complete a level in Assualt mode (the if-all-enemies-are-dead-line was missing).

Edit 2:
Added Mac-version.
I found a bug in the camera code when I tested the Mac version. The ship ended up outside the screen sometimes. :/
I updated the Windows-version with the same fix (changed two lines of code) just to make sure the game is playable, which I hope was an ok thing to do.

Edit 3:
Added Linux-version. I haven't tested it myself but a friend tried it out and it worked for him at least. :)