Space Station Hippy

You are the Space Station Hippy, who has to defend his space station from swarms of alien breed. Using a cannon, connected to the satellite, fire (according to the direction which you are moving) at the alien breeds. If you're careful enough, you'll succeed to the next lot of alien swarms. One problem with this battle is that you will only have 2 lives at the start and you will gain another life with every 10,000 points.