Capcom has released a nice one-level demo for the recently released Zack and Wiki: Quest for Barbaros' Treasure.
We're not entirely sure if it's a level from the original game as we're shamefully stuck on one of the earlier levels, but it certainly taxes our brain in the same way the full thing does.
And read that as we've had a quick go and can't figure out what we should be burning using the shaft of light and the mirror. Answers in the comments below, please.
If the demo tempts you, NGamer gave the title a whopping 90 percent here in its review, so there's really no justification not to buy it.