Here is the full list of all 10 Shape Storm achievements.
Beat the game on sweet difficulty (or higher)
Beat the game on sweet difficulty (or higher) without using a continue
Beat the game on mild difficulty (or higher)
Beat the game on mild difficulty (or higher) without using a continue
Beat the game on bitter difficulty (or higher)
Beat the game on bitter difficulty (or higher) without using a continue
Beat the game on spicy difficulty
Beat the game on spicy difficulty without using a continue
Beat the game without powerups
Beat the game without powerups or using a continue