DO ALL OF THIS IN FULLSCREEN Press New TAS to create a new TAS. (this will delete your previous one). Then press spacebar and hold the keys you want to use to advance the game one frame. Hold the right arrow key to record inputs faster. Press 9 to save, and 0 to load. Once you finish the tas, you can play it back by pressing the flag, then press the run tas button. Remix the project to save the tas.
Current fastest TAS: https://scratch.mit.edu/projects/517421623/fullscreen/ Ask me if you have any questions!