Super Smash Land is a free to play PC Game that is designed to look and feel like it is being played on the original Nintendo Gameboy. The popular N64 experience is simplified while keeping the characters and features you are used to along with some creative modifications.
Trying it out is easy enough; grab it for your PC with the link to left. The [Arrow Keys] are the default movement keys while [Z] is A and [X] is B and [Enter] is Start. Controls can be changed in the Options Menu.