Ryan Good Those are simulated scan-lines. They are an option you can turn off or on using the XRGB. If you were alive back when people gamed on CRT TV's, you would remember that's how games looked on the TV's. Most games of the era actually look better with scan-lines because they were designed with CRT TV's in mind.
It's awesome in the higher framerate that you uploaded!
Why are there lines across the screen?
Ryan Good Those are simulated scan-lines. They are an option you can turn off or on using the XRGB. If you were alive back when people gamed on CRT TV's, you would remember that's how games looked on the TV's. Most games of the era actually look better with scan-lines because they were designed with CRT TV's in mind.