Press on the arrow keys to move your ship. Watch out for the plasma balls and the little ships. Get yellow balls to gain one hundred gold. Your gold amount is in the top right corner. Your damage per shot is right under your gold. If your amount of gold is greater than or equal to the number to the left of it, then hit the space key and your damage per shot will increase. Collect blue balls to heal. Your health percentage is in the top left corner. To the right of your health is your score. Right below the health variable is your fire rate. Your fire rate is how long you have to wait from one shot to the next. Collect green balls to decrease this number. Every five thousand points you get there is a boss. No other enemies will come in while you are fighting the boss. Now have fun playing the game!