When you load the game, hit Alt + ENTER. This should put it in fullscreen.
Also getting a very small screen on a high resolution monitor.
Right clicking the .exe > Properties > Compatibility > Change High DPI Settings > cecking High DPI Scaling Overide > selecting System.
Helped get the game big enough to click the resolution buttons in game, however the cursor may not be accurate.
If there was a full screen option that would be great!