after you pass the green blob, you will see a yellow door, don't take it and go ahead, you will see a blue door if you had jumped on the blue P, surrounded by blocs. Wait until the effect of the blue P end, the blue door will desapear, and the blocs will become coins.
eat the coins and go back to the yellow door.
Next time you will see the blue door if the blue P is in effect, and the blocs are absent. take the blue door. you pass.
