InnerBody is a freeware title by RT Soft, the developer of Dungeon Scroll. Originally a Ludum Dare 48 hour competition entry, it plays a little like the turntable scratching portion of the Beatmania series.

In each level, your ship will travel alongside two parallel lines. Your mission is to change the red parts of the line from red to green, by pressing the left or right arrow key at the right moment.

Name: InnerBody
Developer: RT Soft
Category: Action
Type: Freeware
Size: 1MB