By popular demand, I've added an option to cap the game's FPS. You can set this option to 300, 120, 60 or off (defaults to 300). Enable this if the game is heating up your GPU. Also added some more resolution options.
This is my current list of things to do (in rough order of priority):
I'll be steadily working my way through this list and crossing things off as I fix them over the coming weeks. The game hasn't sold particularly well, and I have other jobs to do, so I won't be able to get through these tasks as fast as I'd like, but they'll all get done eventually. If you find any more problems, let me know in the comments on this article and I'll add them to the list.
In other news, if by some small chance you are reading this and haven't already, you should check out Open Hexagon on Steam.

It's another great game based on Super Hexagon that's closer to the original formula, but with level creation tools, so it has an absolute ton of fan-made levels to play (and more are being made all the time by its active community). It also introduces a couple of new mechanics like curved walls and a '180 degree switch' button, plus it has a very good soundtrack. It's 10% off, at time of writing.
That's all for now. See you on the leaderboards.