itch.io

1) Click the "Find Games" button on the main menu

2) There should be a list of matches to join, to create one press the "Create Match" button

3) Choose the name of the match, the map, the number of frags required to win, etc. Once you're done press the "Create Match" button

4) If everything goes right you should be ingame, in order to join the match, your friends now have to repeat Step 1, select in the list the row with your match name, and press the "Join" button

If any subsequent help is required feel free to reply