Gimmick Puppets are basically just a graveyard-heavy Rank-8 xyz engine with an okay pool of Rank-Up Magic targets. The archetype lacks good protection and usually benefits from your opponent having monsters on the field, so you will probably want to go second.
Gimmick Puppets... aren't very good, but they hold a special place in my heart. I've been playing them casually for about 7 years.
This particular build is a budget deck that was made during Master Rule 4, so I am sure there are several updates that could be made (eg. Girsu, Zeus, Hand Traps, etc.).
...
I prefer Inferno Reckless Summon to Machine Duplication in most cases, since it allows you to get out Magnet Doll and Bisque Doll and can set up the field for a board wipe with Dark Strings or Pain Gainer. (If you're already playing Magnet Doll, you've submitted to the fact that you are be dependent on your opponent's board anyways)
Desperado Barrel Dragon and Heavy Metal Raiders are in there just for jollies, since most your deck is mostly dark machines with low Attack.
I never understood why Konami made Gear Changer an EARTH monster that can't be searched from the deck. I guess they were just scared that Pups would be TOO GOOD.
Have fun out there!