That demo song is a pretty bad rendition of the Donkey Kong intro theme; it doesn’t even follow a proper beat. Here’s a much better version:
[:piano {:tempo 130} 1/8 :c :c 5/8 :a 1/8 :f :g :f 3/4 :d 1/8 :d :d 5/8 :a# 1/8 :g :a :g 3/4 :e 1/8 :e :e 5/8 :+c 1/8 :a :a# :+c 3/4 :+d 1/8 :f :g 5/8 :a 1/8 :e :f :g 3/4 :f]
That demo song is a pretty bad rendition of the Donkey Kong intro theme; it doesn’t even follow a proper beat. Here’s a much better version: