Game Plan

Draw Blackrock 'n' Roll with Steam Guardian and play big minions every turn to overwhelm your opponent.

If you're facing a highlander deck, be careful to not overcommit just before they might play Reno.

Probably not a top-tier deck, but it can certainly win games.

Mulligan

Always keep Steam Guardian. You can keep Party Animal and some cheap minions when facing an aggressive deck. Against control it's probably best to hard mulligan for Steam Guardian instead.

You could decide to keep Blackrock 'n' Roll when on the Coin, but if you go first you really need the discount on this.

Replacements

Blackrock 'n' Roll is key, if you're missing that, just play another deck.

Zilliax Deluxe 3000 could be replaced by a second copy of Testing Dummy.

If you're missing The One-Amalgam Band, I would recommend replacing most of the tribal minions with taunts.