Another great SHMUP ( Shoot em Up) for your cellphone get it free and get a shooter in your pocket for long travel. You can upgrade you spaceship, play with friends or other plays together and upgrade your weapons. The only negative you should not easy get addicted and pay for ingame upgrades. if you are not then you are fine becouse after some time you run out of fuel and need to wait some hours or pay for instant refuel. so nice to have but the classics on sega saturn, nintendo and neogeo are still the best.