The one that started it all. No run, no slide, no copy abilities.
Just a simple jump, inhaling and spitting back enemies, and infinite flying in a platformer game. It sets out everything it wants to do and not much else, and- oh it's already over.
Ah well. It puts a smile on my face everytime I play it and I'm basically guaranteed to finishing it when I do so it's like a fulfilling bite sized game.
Extra Game is kind of bullshit though.