I'm not sure how you can go faster/slower but here's my times too!
Viewing post in Directionless jam comments
So it's a bit hidden, but yellow arrows are mashable buttons, meaning you can repeat the input multiple times and it takes out 1 second every time you do so. So you have to control how much you want to mash the button without messing the rest of the inputs and before colliding with the wall.
That's why on the tutorial, the narrator says: ""Through dedication and intense repetition you will find the secret..." :)
Thank you for posting your times, 22 minutes is long though for the tutorial I wonder what happened there ahahah