It looks nice and surely interesting to check out for anyone into chiptune music making.
It is in a tracker sequencer stylelee though, so be aware if being scared of heights and only used to horizontal piano rolls!
It is also for freeee and without anal probing also known as advertisement!
There is no information given except this:
Fake SID is a chiptune tracker that let's you create Commodore 64 music.
But it does not seem too hard to figure out with an hour or two of exploration.