Could Tiger's old Game.com handle a game such as Super Mario Galaxy? Well, if you take away the color, then it could totally be done! And since the original Game.com had two cartridge slots, you could easily store the game on two or more carts, each time just loading more data from each cart as you needed. As proven in Super Mario 64 DS, 3-D Mario is a cinch to control with just a directional pad, just use one of the face buttons to control speed. And the on-screen Star Bit reticle? Why, the Game.com's touch screen was MADE for that function! Just tap anywhere on the screen to fire them off!
And just look at these mock screenshots...
Looks JUST like the Wii version, just a lack of color. In fact, it could be SUPERIOR in many ways.