It's most likely displayed because your monitor doesn't support the refresh rate requested by the full screen mode. It's rather an issue of the Unity engine which is used by the game than of the game itself.
You can change the settings in preferences file (on Linux or MacOS X) or in registry (on Windows) to run the game in windowed mode, which will use the screen refresh rate of your desktop.
Google translate:
Este afișat cel mai probabil, deoarece monitorul nu suporta rata de refresh solicitate de modul ecran complet. Este mai degrabă o problemă a motorului Unity care este folosit de joc decât de jocul în sine.
Puteți modifica setările în fișierul de preferințe (pe Linux sau MacOS X) sau în registrul (pe Windows) pentru a rula jocul în modul fereastră, care se va folosi rata de reîmprospătare a ecranului de desktop.
Unde am gasit eu era vorba despre un alt joc.
1. Press "Windows" + R keys simultaneously. It should open "Run..." dialog box.
2. Type "regedit", press enter. Accept the UAC confirmation box. Registry Editor should appear.
3. On the left side of Registry Editor's window find "HKEY_CURRENT_USER" and extend it.
4. Next extend "Software" in the tree, find "Bossa Studios" entry inside it and extend it, too.
5. Select "Surgeon Simulator 2013" key.
6. On the right side of the window, find a key starting with "fullScreen_".
7. Doubleclick on it and change the value to 0. Save changes.
8. In the same part of the window find a key starting with "Screenmanager Is Fullscreen mode_".
9. Doubleclick on it and change the value to 0. Save changes.
From now on the game should be starting in windowed mode, where you should have no problems with "input not supported".
You could try changing to other screen resolutions, because some of them may work in the full screen mode without problems.
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