I am far, far too stupid to contextualise Ynglet in any meaningful way, so instead, having played it for a half hour, I'm just going to tell you what I did.
A huge 2D plane, and I'm this funny little dancing doodle moving around in it. I have a tail and sort of a head I guess and I fall unless I'm inside one of these little 2D shapes that give the place a kind of doodled shape and form. I can move between them and travel a bit, but I always have to end up inside a shape or I fall and restart.
It feels lovely, like swimming, and with the constant tug of gravity. And it's forgiving, because if I want to declare that the shape I'm currently inside is a checkpoint I just hang out in it for a few seconds and then a line is drawn around it and bang: it is a checkpoint.