Great game. I recommend rethinking some of the menus, though. In the Protectopedia, it's hard to see the Return to Menu button because it blends with the rest of the information onscreen.
Nice game. Some of the levels rely too much on whether it's decided that Red/Blue is quite past the centre of a particular barrier, taking the emphasis off the strategy and making it a matter of fractions of seconds that take much longer to retry.
 "Protector"){kind=icon}
 "Speed Ball"){kind=icon}
 "The Unfair Platformer"){kind=icon}
 "Sola Rola - The Gravity Maze"){kind=icon}
 "Ether Cannon"){kind=icon}