Alright, necro, but I feel that this is too cool of a deck to let it fade into the oblivion of forum history.
Last night, I won an upped Unstable Gas from Octane (my first, surprisingly) and that set me into trying to find a decent way to use it. After a bunch of testing, I came up with a deck that was, quite literally, almost the exact same as the one in OP (even the card amounts) and I had a ton of fun playing it. I had planned on posting it on the forums last night, but a search showed me this deck, so I refrained.
The only change between mine and this one is that mine isn't full upped (didn't have the money), and I have -1 Tower, +1 Long Sword. Apart from necroing this, I wanted to point out that the Long Sword is a great addition to this deck, and helps out in a few different (not altogether rare) occasions.
The best example is one where your opponent has 42-46 hp (or 62-66 hp), and you have only 2 (or 3) UG's to blow up. Blowing them up this turn kills your Damsels, and forces you to wait for another UG/Damsel to finish him off, OR forces you to attack that turn and blow them up the next turn. Long Sword lets you explode the Gases and still finish the opponent off in those situations. I had a game where my enemy stole my UG on his turn, resulting in a loss, and another game where my opponent played a Mirror Shield, resulting in a loss. A Long Sword would have (and, since it's addition, has) saved those losses.
Someone had posted (basically) a copy of this last night, and requested its deletion because I pointed out it was a repost, else I honestly wouldn't be necroing this.
Anyway, really cool deck, with very frequent 5-6 TTW, and an occasional 4 TTW. And, it seems to leave opponents in PvP2 stumped right up until you play your first UG, then you get a message along the lines of "oh...".