Fullscreen not supported for MS-DOS

So I have a moment of nostalgia and I downloaded D-Generation to play. But upon clicking the .exe file, I get an error that DOS fullscreen mode is not supported. I even tried tinkering with the properties and alt+enter (yes, it should work for DOS as well as MapleStory).

Is there a way around this? Or is it impossible for me to enjoy D-Generation? =(