Super Smash Land is a demake of Super Smash Bros, written in Game Maker 8 and with a retro Game Boy feel.
It starts with 4 available characters (Mario, Kirby, Link, Pikachu), half of the available stages in versus mode.
I know that finishing once the arcade mode will unlock the Mega Man stage. But what must I do to unlock the other stages? And how to unlock the characters? And the Endless mode (currently grayed-out in the main menu)?