It's a bit harder to test an Mverse script and messaging between instances.

Here is a Windows batch file that can assist in starting a second instance of CW4 on the same computer. Once you have this up, you can establish an Mverse session between the two instances by choosing the LAN option for Mverse hosting. Copy the invitation code on the host and press “paste” on the client side.

In the file below, make sure to change the path to the path on *your* computer where you have CW4 installed.

CW4Mverse.BAT

@Echo OFF	
 
START "" "E:\Steam\steamapps\common\Creeper World 4\CW4.exe" multirun
 
EXIT /B

While in an Mverse session, you can enable the Editor with the following keyboard shortcut. Note you have to press both Ctrl keys simultaneously. CTRL + CTRL + keys for editor mode (default: Shift + E)