If you don't know pixel games benefit from a crt/scanlines filter and makes the look way better, that is because back in the time video game developers would rely on the natural scanlines of crt TV's to smooth out their pixel graphic design work and make it look nice. Here are a few examples (quite shocking):

Any step by step on how to do it now using a program would be appreciated. Also suggesting it adding it as either built-in or plugin feature.
