There's a new option in Settings menu. Once you set the number of replay files to save, the game will automatically record your every game, and you can go back and watch it. This is especially useful if you had a good run and want to post screenshots or videos. With automatic recording, you don't have to prepare in advance. Just play the game as you usually do, and if the run was good or there was something interesting to share, it's easy to extract.

You can play on one computer and replay on another, even cross-platform. This means that one can easily verify future daily challenges, speed-runs, and also any bugs will be easier to track.

The game only records the draw calls, without actual images, so the replay file takes about 25MB per recorded minute. It pauses the recording if you leave the game running for 10 seconds without any input. There's also a setting to limit the file size and the game will record only up to that point.