This is one of my oldest projects I made when I first got an account. The concept was cool, but the engine for it was pretty bad (This engine is, though, the very engine that evolved eventually into the Super Mega Mario engine) and it had nothing to do with Mario or Luigi which is what my account was about. I may recreate it next Christmas with an improved engine and replace the elves with Mario and Luigi. Old desc: This is a world where you can just roam around, do parkour, and complete my achievements! Arrow keys to move and jump. Press 2 to summon a second player. Use awsd to move and jump with player 2. Press 1 to make player 2 vanish.
I felt like posting this even though it's nowhere near Christmas. Old credits: I made this project by myself (Except for the music, credit to @Kronk.) But I worked really hard on it. Please, please, please love, favorite, and follow. Player 2 is a little buggy. I REALLY hope this project gets popular, so please share it with other people.