Classic Alchemist Pathfinder, driving a small spaceship through a series of levels while taking everything in advance is a vertical shooter game.
A large number of different colors, surrealist settings for the game, it’s not hard to defeat enemies to take a different mapped overwhelmed–contains a lot of levels.
Since your ship is constantly moving, the game is quite simple. The only thing on the speed control. And, of course, you can jump to avoid obstacles and fire to the dollar.
Alchemist, for a very reasonable price of zero dollars, it’s a long game and pretty fun to keep you busy for hours.