Cool, good work.
I also find it good that you try to play without notes. In my eyes, playing with notes makes you more dependant. Since you would have to need always some sheets of paper infront of you to play something.
I also would like to play some Amiga tunes (for example Apidya level 1 music, some stuff from Lemmings, etc.) but I cant read any notes.
But at least I am able to teach myself some songs/melodies too. But definetly not as good as you can. I guess I will try Grand Monster Slam title theme next time - should be easy.
Also, mach weiter so.