YOU MUST HAVE FLASH 8 TO PLAY
The basic keys:
P = Pause game
SPACE = increases shot power, shoot(when released)
MOUSE = aim (this can be changed in options)
There are some unlocks & stuff you need to figure out by yourself ;)
In mission mode, the levels are saved right after you beat them, so don't worry about closing & opening the game many times.
All the extra levels have an individual highscore table.
If it takes too much time during the countdown, you should use no anti-alias (changeable in options)
The reason that is "demo version" is because the full one would overload my SQL server here 0_0