Just DLed and ran around, have some feedback.
When you spawn facing that yellow dot, I had no idea that I was supposed to step on it and it would teleport me. Signage here would be nice.
Also, you may want to open up spawn a bit more. As right now it is either go forward or go behind you to the battlements. Which makes it hard for you to make signs to direct people to the battlements. An idea would be to do something like what I put below, where you have the spawn areas set to be what I have in blue, and then signs what I put in red.
You have some windows which I feel like I hsould be able to jump through, but can't. Either remove the player clip, or add glass.
The glass changes depending on what side I am on, not sure what is causing it but you will want to fix it
The grey dots in the middle that TP to the hurty water makes me sad. Really the hurty water in general makes me sad. :/ Also for jumping off the middle platform, you may want to make that so you don't have to super jump, as most newbs dont know how to.
I hope that helps.