In the first step of the game creation you will enter the basic information for the game and select what languages to use for the game. The system supports multiple languages for each game.
Under the basic game information section you will confirm the name you have chosen for the project. You can see the publisher name and select the maximum number of teams you want to be able to play the game. Once you have filled in the required fields you can upload a logo for the game, just click on the image icon that is already there and you will be taken to the media manager where you can upload the image you want as the logo.
Also check this video, which explains the whole Treasure Hunt creation process: