Make sure 2+ casual players have an equal chance of winning in minutes.

The simplest way is to visit the Steam Workshop from the Steam overlay, and subscribe to some interesting levels. Alternatively, create/load and test local levels.

Once you have some custom levels, exit to the main menu and:

1. Play Game, Start, Ready
2. Play Online, Create Game
3. Settings, Match Settings
4. Custom Levels: 25+%, enable your favorites.
5. Back, Create Game, Ready, wait for players, ensure equal hat distribution if teams are on, Start
6. Don't kill your teammates, if any.
7. Chat via enter, message, enter.
8. If the level sucks: pause, unsub, and skip.

Workshop items can't seem to be deleted from Duck Game itself, so after unsubcribing in the Steam Workshop, delete the .lev file at, for example: D:\SteamLibrary\steamapps\workshop\content\312530\583460189\Lobby.lev