Move with the arrow keys, press space to fire. Grab power cores to increase your ship's power. Yellow ones give your bullets more power, blue ones make you go faster, red ones increase health, purple ones give you a score boost, and green ones give you rapid fire. Every 75,000 points, you get an extra life. At 10,000 points and every 15,000 points after that, you battle a boss. White enemy bullets follow you for a certain time. When you die, your stats go back to their original.