It would be cool to be able to punch the goombas like in smash bros

could you be more descriptive im not really sure what this post means

take the chimney

Goombas (you take damage if they run into you and you can stomp them)
Hell (deep underground or use the chimney warp)
Arena (you can double jump, and you die if you fall off)

how do you win goomba hell

you don't win goomba hell. they keep respawning... forever. I do want to add a boss though, and defeating it would get you something