Hall of Infinite Doors

as soon as the mushroom enters your gullet, you fell strange.

Sudenly you appear to grow untill you break open the roof with your head.

Now you are in a strange 2-D world.

"I must realy be tripping" you mutter as you see lots of little brown things
everywhere. You jump on one and it disapears.

Now you see a turtle guarding a strange flower. As you approach it turns to look at you, seemingly dareing you to approach the flower.

Beside the turtle is a large pipe. You see a short, fat man in blue overalls jump into it.

What should you do?