Some questions to who did the svg's for Mario Bros:
Is there any way of removing those 'round corner' marks? They are no longer needed since the round corners will be done by the external artwork anyway. This applies to other G&W games as well.
And one final question (this one applies to all games, not only to MarioBros): since the original G&W games have a 'grey' tone in their backgrounds, would it be also possible to have a grey color instead of white as the mais background color?
If these things are simple to fix, I think it would worth doing them to achieve a better overall look.