Go to Level 5, and watch the magic happen! If you would like to optimize this further, you can try, but it's quite frustrating. I would know. However, I don't recommend it, as @KlimbRio1 has already optimized this by another 2 milliseconds! I don't think it's possible to go faster than that.
Thanks to Swskrei for the idea of this route, as well as encouraging me to optimize it! If you are wondering, I know that I am not the first to create a TAS of this. Note that this TAS is different from the other one, and I did not steal this TAS; it just looks similar. I just wanted to clear this up, enjoy! --Updates-- 11/7/23 - Release of 12.9 TAS: https://scratch.mit.edu/projects/898637648/ 11/9/23 - Release of 12.8 TAS