The objective of 41st Reality is to destroy enemies and stay alive for as long as you can.
Move Up: W or Up Arrow Key
Move Down: S or Down Arrow Key
Move Left: A or Left Arrow Key
Move Right: D or Right Arrow Key
Activate Powerup: Left-Click
Since your ship fires automatically, you can focus your attention on not getting hit. Some enemies will split into multiple enemies when hit. Don't hit too many of them at a time, or it will be difficult to avoid them all. Collect powerups whenever possible. Don't hesitate to use bombs if you need to.