The best indie puzzle platformer I've played to date. Even better than Inside and Limbo. Completely satisfying when you figure things out and it never feels like you're struggling due to bad design or controls. The rules change in build on each other in ways that keep it from ever getting stale.

The only thing lacking is the story, which I'm pretty sure developers might believe to be one of the most deep and profound stories ever told, but mostly you're just a little bug astronaut hauling around magic marbles and that's still very fun.