Unlockable - Unlockables | |
| "Boss on Parade" mode | Complete the game (any difficulty) |
| "Stage Select" mode | Clear "Boss on Parade" mode |
Unlockable - Sound Test | |
| Set a high score in the Normal, 2-Minute, and 5-Minute modes with ALL 3 ships. | |
Unlockable - God difficulty | |
| Complete level 10 on 'Hard' to reveal the 'God' difficulty setting. You can play through the whole game or use Stage Select to warp right to level 10. | |
Unlockable - Fourth ship | |
| Attack the level-8 crab boss until it transforms into its ship form. Do not destroy the boss. Instead, avoid its bullets until it leaves the screen. You'll unlock the fourth ship for your trouble. Using stage select to warp directly to level-8 is OK. | |
