** NEW EDIT (28th Aug) : I can't believe you gents managed to get the scores you did :o) The Beta testers got nowhere near the levels you lot have :o) **
** EDIT (27th Aug) : Thanks for all the feedback so far, was looking to do a version in the future with more strategy. **
Retro arcade style shooter .. Control the infection before it spawns and damages you. Try and keep up as the infection spreads faster and faster. Collect power-ups such a smartbombs, beam lazers and more to keep those little spores under control.
Left and Right arrow keys to spin around the playing area. Space bar toggles the autofire. Numeric keys 1 through to 7 fire the collected power-ups, each of which has a recharge time. Kill the infection squares before they turn white and spawn spores to attack you. Killing good squares spawns a good spore containing a power-up to use or boost your existing ones.
It gets frentic .. good luck.