(sorry, no link ATM, but that will change :/)
Anyway, I don't know if fangames/AU's are acceptable, but I can't find a complete piano arrangement of the song by SharaX.
Seeing that there's no link, you'll have to look it up yourself (for the time being). It has been reposted as "Inklovania", "Ink Sans' Theme" and various other things like that.
If you accept, thanks in advance.