On level 16 you can time your jump to hit the bottom of the pillar after you jump over the first spikes. if you spam and hit it right you will launch up to the finish goal. ive done it once and have gotten close to getting it again. and on level 18 with the marble drop funnel right before you enter if you hit the corner of the platform you can go on the left side of the funnel and then double jump into the finish block. am i just dumb or have people found it but its just incredibly inefficient