1. Download Solar Smash from the App Store or Google Play.
2. Open Solar Smash and select "New Game."
3. Choose your character.
4. Select your stage.
5. Choose your opponent's character.
6. Select your opponent's stage.
7. Choose your game mode.
8. Select your opponent's game mode.
9. Choose your difficulty.
10. Select your opponent's difficulty.
11. Select your controls.
12. Select "Ready."
13. Choose your power-ups.
14. Select "Start."
15. Move your character around the stage and attack your opponent.
16. When your opponent is defeated, the game will end and you will be shown the results.