- Concept art
Find collectibles during the game. Successfully complete the game to unlock the 'Gallery' option to view the unlocked art.

- Music
Successfully complete the game to unlock the 'Music' option, which allows you to listen to various tracks.

- Control credits
Highlight the flies and meteorite when they appear during the credits, and press A to shoot them.

- Bonus mini-games
Successfully complete the game to unlock a new set of mini-games.

- Infinite ammunition
Acquire all 81 meteorites to unlock unlimited radical-type weapon ammunition.

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