Starship Ranger 2

Starship Ranger 2 is a great arcade game. You fly a spaceship through space and, like in Raiden X, you have to destroy the approaching ships but avoid their shots. Collect items to get better weapons and to make your ship stronger. After each level, you can use your points to upgrade one of the various weapons in different classes. It makes sense to upgrade your most commonly used weapon to the full scale.