Overwatch - Mercy plays the Mario theme on a piano

It all sounded good when I tried it on a virtual piano, to see which notes would go well together, but the same combo on this piano doesn't sound the same. So, the stuff on the left side sometimes have stuff that sound sooo out of tune, like the part at 00:52, which is played a few times. And some stuff later on. Oh well, couldn't be bothered find better suited combos :) I instead play the “clean“ version at the end of the video without the left side part.