Ran this paired with another simple adventure and had loads of fun.
Favorite moment was when the players questioned a frogling outside of the town about 'magic inside the city'. He would describe various technical or aesthetic things (the watermill, horseback frog soldiers cantering along in their finery, tinsmithing, loans) and exclaim "is that the sort of magic you mean?" He conly got around to the curse on the fourth or fifth go.