Nanotube is a fantastic little game that puts your hand/eye coordination through the paces as you attempt to block escaping balls from leaving the circle by matching up corresponding colors. With nothing more than the left and right arrow keys, you spin your blocking walls around the circle keeping those pesky balls in their place. The game starts out simply enough with a single color, but soon you’re having to coordinate 4 color blocks.
Super fun. Play Nanotube