This item appears to be out of date.
Unfourtinatly, i am no longer using Game Builder due to a hetic life.
Maybe someone would enjoy ripping it apart and updating it?

Got this error message:

Script error for actor 'PlayerOne' from card '':
Error: Assert failed: APIv2 context not set up. Make sure your handler function starts with a **lower-case** 'o', like onMessage, NOT OnMessage. Stack trace:
Error: Assert failed: APIv2 context not set up. Make sure your handler function starts with a **lower-case** 'o', like onMessage, NOT OnMessage.
at assert (<anonymous>:988:11)
at Function.get instance [as instance] (<anonymous>:5360:12)
at log (<anonymous>:5889:16)
at MessageHandlingContext.OnBuildTerrain [as handler_] (line 1155:3)

its fun

It's not designed for multiplayer -
BUT it will work in multiplayer without the player hosting needing any scripts from you,
but if you build too large of a section at once then you are likely to get disconnected.
so keep your build sizes small in multiplayer, just build small sections at a time.

V2 is in the works and that one will be multiplayer compatible for sure due to popular demand.

To use this builder tool, do you have to make the game in the server with the build tool or can it go to different servers?

This needs to be in the front page.

quick hotfix update. Forgot to mention in the info text box that E is the build key.