A stick that will not stop rotating, and corridors that will not get any wider. It taught this game that the spin should never be something you switch off. It keeps going whether you are ready or not, and the only thing you really control is when.

Grab a peg, swing round it, let go at the right moment and fly. The pivot as a way of moving rather than a way of being stuck. Letting go a fraction late sends you somewhere else entirely.

Hours and hours lost in it, and most of them not playing but building. The editor here comes straight from that: make something, beat it yourself to prove it can be beaten, then put it out for everyone else.

The same trade, on one button: you alternate pivots and spin your way through what is in the way. It says the idea carries a whole game on its own, and that it can wear anything — theirs is built out of Bauhaus circles and bars where this one is a municipal park.

The one that showed me somebody else had the same idea, and that it holds up as a whole game. There is nothing like it on a phone, and that is the part that actually got this built. It deserves to be something you can play standing at a bus stop.