I like the idea, it's an interesting concept. However I played it in Trainer and beat it with an upped Mono-Gravity...Gravity Shield wrecks the Steam Machine strategy and the AI's too dumb to use Ice Lances directly rather than as CC, allowing me to waste it on some of my creatures. Of course that's only because I used a counter against it, against more standard decks this would probably a pain to face. A couple of Explosions, although against your 'theme', might make it even more difficult.
Also, if you're open to alternative names...maybe Steampunk would be fitting for this FG?