Campaign
The campaign is a set of hand-built levels. A tutorial level (Level 0) teaches with the real objects: your first swipe, a bounce off a wall to a finish up high, a sticky wall and spikes. A hand shows you where to swipe at the very start, and after that you are on your own.
New ideas arrive one at a time: first static walls, then sticky surfaces, then moving platforms and combinations of all three. A level ends in a win or a loss, with no stars and no scores. Solving it is the reward.