The game has a perfect for those who like this kind of games, retro arcade style has great difficulty and many enemies, including:
The enemy ships: Those that come out of the alien base and you have to shoot down the basis for these no longer appear.
Probes enemy: Also out of extraterrestrial bases, but unlike the ships, these fire and are a little slower, and seek to position your ship around to shoot.
Space Worm: While this is not an alien enemy, but a neutral enemy, this ara damage to anything it touches, can even destroy bases, these appear when a black hole appears, these worms come out of these black holes stroll serca a bit player and then disappear entering another black hole, if you are very close to the black hole you can be attracted and pushed very hard for space.
There are also objects such as asteroids, planetoids and satellites floating in space that can destroy anything they touch, but they are small and they too are destroyed.
I challenge you overcome my score in the game, I have thought many things for this game and soon the scores are stored on my server, and the scores will be worldwide, but soon, currently there. Good luck with the enemies !. :)
* Translated into English with Google translator. *