Defend the galaxy from the invading aliens

Instructions: Kill as many aliens as you can.

Move with left/right arrow keys.

Shoot with space bar.

Increasing the difficulty will increase the amount of xp you gain per kill.

The higher your score, the greater the value of collected coins.

Use coins and xp to unlock new ships and perks.

Destroy the bosses by hitting the orbiting balls and lowering their shields.

Pause your game by pressing escape.

From the pause menu, you can edit your ship's speed