Epic!
This game is just amazing! It's simplicity and increasing difficulty makes it so addicting. The ability to upgrade your weaponry reminds me of Nazi Zombies because the farther you go the better guns you get, thus adding another drive to get farther in this game.
here
here is a link
http://www.kongregate.com/games/Casua lCollective/the-space-game
is good
not bad. not bad
meh...
it`s okay.
Amazing.
I made it to wave 21, and I have to say, this is the greatest flash game I have ever played, please, keep making games of this caliber!