Circa Infinity is a very unique almost-platformer almost-puzzle game, where you navigate through a stage by navigating inwards through successive circles. Enemy/obstacle mechanics slowly become more complicated with each stage you complete. At the end you have to keep track of like five different things at once, it's a real brain workout.

I really loved this game and want to see more people playing it. Maybe someone will upload a proper speedrun someday, even!

My sloppy attempt at speedrun mode is 1:26:21. BEAT MY TIME.