Yeah, Demolisher doesn't even have a bunch of good synergies that might make you want to run it (Mech stuff, a zillion taunts or Hobgoblin). I also wonder why you're running Ooze without any buffers and just one Tuskar. It looks like you're trying to flood the board (Ooze, Creeper, Feral, Harvest, Imp Master, Kel, Tuskar, Tidehunter, plus Youthful Brewmasters to bounce things) and overwhelm your opponent but you don't have any Bloodlust? That's what Shamans do when they overrun the board, they cast Bloodlust and then win because it gives them +9/+12/+15 damage all at once.
Also if you have Sludge Belchers they are better than Fen Creepers, but if you don't Fen is okay though I'd probably prefer Senjins to get them out a turn earlier.