very minor bug in demo
Upon completing the demo, I went back to look at the characters I'd unlocked. Mousing over the ones who were still locked, some but not all -- about 8 of them -- said something like "Can be found in AdventureName XX" in the mouseover text (XX being various numbers). They hadn't said this before I finished the demo.
Also, I don't know if this is intended behavior or not, but upon completing the final demo mission I got the Awards for completing all missions, completing all with Gold, completing all without dying, etc. ... I did technically qualify for those, I suppose, but was surprised since I hadn't thought of the demo as a 6-level game rather than a 20-level game with 14 locked.