This is a near final version of Mario Bros. that was found on a
hard drive (also dated 8-12-88). While the gameplay seems to
be the same as the final version the title screen music plays at
double the speed of the released version! It's unknown why
this version was made (perhaps the programmer was toying around),
but the music does indeed sound better when sped up.
Differences
The music on the title screen plays at
double the speed