I ended up starting pretty late, but for about 11 hours worth of work, I'm pretty happy with the final result. It's also my first time finishing something with the Godot engine and it was a blast to use :)

Here's Power Ring Facility, a difficult platformer with gameplay inspired by Dustforce and aesthetics inspired by Portal:

You can play Power Ring Facility online at https://itch.io/embed-upload/548948 or download the game for Windows, Mac OS X, or Linux at https://kz.itch.io/power-ring-facility.