I wanted to post a video of what I did to learn it by heart so as to remove any doubt on whether I Midi ripped the piece:

To get familiar with a piece of music, memorizing it and playing it on the piano really helps.

Here's the track that came out of wanting to play it on the piano:

It's not that difficult of a piece to learn by ear either, but it certainly is a bit strenuous on the wrists.