hmmm, i havent been able to test much long range, make sure you get the IP of the person whos hosting, also try some of the other IP's in the list, we've noticed that the specific IP needed can vary based on if a VPN is installed or whos connecting, hope this helps, if it doesnt try using the normal VPN network method.
Viewing post in Connect By IP! - Update 1.3 comments
We got it working using the vpn method. The game looks great! One problem is that there seems to be a problem where walls will spawn in front of doors, effectively making the game impossible to beat without killing the monster. Also, the AI for the monster feels really aggressive and as of right now near impossible to beat. Besides that my friends are really impressed with it! Keep it up!