nice job.
I just tried it out. One minor thing, when you first load it the doors are not locked, so the first time you run through after loading it is possible to go right to the champ by just opening the doors. In your GSpawnHallway spawner I would spawn the doors with /locked/true.
Also, in the last creature spawner before your champ you spawn a "revenantlion". That is a custom se creature that is not in the distro so some people might not have it. If they dont, then they just need to replace it with something else otherwise they cant finish.
btw, I like your messages
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