Mysterium: It has a question mark, indicating it's mysterious.
Unobtanium: It doesn't obtain anything.
Eternium: It has an infinity symbol, indicating it's eternal.
Absurdium: It's flipped, which is absurd.
Demonite: It looks a bit like a demon
Hellstone: You know it...
Thanks, bontegames, for making another Sugar, Sugar sequel! I really enjoy your sugar games! Also, thanks for the "next level" button after you complete each level!