Hello, there's an issue with multi screen
For some reason the game started on my secondary monitor, and I had no ability to move it to the primary one. I launched it again after disabling the second monitor, it launched on the primary but after that I couldn't be able to keep the secondary monitor back on after enabling it again (it would stop working after any action in game).
Very sorry for the issue and thank you for reporting. We'll be invetsigating! Meanwhile, have you tried deleteing the app's playerprefs?
To delete them, open regedit by pressing the Windows key and typing 'regedit', then pressing ENTER. Browse to 'HKEY_CURRENT_USER\SOFTWARE\Unity\UnityEditor\SantaRagione\HORSES
(you will have to start the game from the beginning!)