Haven't touched the exit, but considering some of the stuff that barely doesn't work, it's very impressive that this is holding together! Hope I can get to the bottom of this rabbit hole of secrets.
This level is pending only one, but still has no completions, even (let alone solves). I'm giving 5 stars (spent 46 minutes on it, already, but still don't know how to touch).
Really cool level! All of the initially reasonable-seeming options are very cleverly blocked. Once I figured out that there's really only one thing that you can do to not deadlock yourself early on, it still took me a little while to see the setup that allows you to do it. After that the optimization was pretty chill. Lots of fun solving this one!