If you are referring to the second level of the game I recommend dashing to the left or the right (A or D + SPACE) right before hitting the roof. If you are referring to the third level of the game I recommend dashing to the right (A + SPACE) almost immediately after destroying the first row of pink heads, then you can repeat this process of dashing to the appropriate direction and inflating until you reach the end. Regardless, thanks for playing the game!