Ah that's explain why, it's a Windows build, we never tried to play the game on Linux. unfortunately, we won't port it on Linux since it's a 10 weeks prototype made for a competition.
A member registered Jan 22, 2018 · View creator page →
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Multiplayer game where 2 players have to play on a single controller, try to survive and collect soaps.
Platformer
A VR game where you have to control the blood circulation ( French narration )
Action
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Hum, never had this issue before... By pressing "GO" a session is created (using the Online Subsystem of Unreal ). Just to clarify, on server side, the level select window appears after pressing A. You should see a label like this. 
If it's not the case, I will take a look and push an update to fix this issue if I can reproduces it.
Sorry about that.
On the client side you should see a game found.
By pressing "Go" on the client, the server will be ready and will wait for an input and then it will show the level select window.
If you can't see a game found on the client, it may be an issue with your network settings. (During development, some of us had virtualbox installed on our PC and we had disable the network adapter of Virtualbox to be able to see games on the LAN.)
Hope that will help :)