Too many games here dont support fullscreen, does this have resolution options?

Just played it for a few hours in fullscreen, no issues here!

Fullscreen? Of course! You can even define the pixel size.

Ok thanks, its just been hard gaming with a 4k monitor and itch.io games, some of the 2d games stay in the middle of the screen and it looks so tiny i cant see anything.

By the way: You could also check out the demo to see if everything works fine. Just saying ;)