Lyle in Cube Sector is a cool new freeware game made in Multimedia Fusion. The gameplay is similar to the Metroid games (acquire new abilities to reach new areas), and it's got cool NES-style graphics.
The 'story': "Ohno! Lyle's kitty has been stolen and now he must journey through the wonked out lands of the Cubesector to retrieve his meowmeow companion!"
I played through it a bit and it's pretty hard, but lots of fun.
I've gotten past the Phantom Cube powerup; I'm really far. Great game, thanks for showing it.