This port doesn't respect a number of the submission guidelines:
-There are no ID666 tags
-There is absolutely no optimization, making the port take up much more space than necessary.
As well, there are long sections where every note is tuned differently with $EE-- this implies that this port was generated with an automatic conversion tool, and along with the points I previously mentioned, that it was not touched up at all. A slew of $EE commands also artificially inflates the insert size, so ideally, ports should use the regular notes instead of $EE unless it's necessary.
If you want to get into porting, I'd recommend checking out Wakana's tutorial here.