This game is absolutely top notch, with a good length, a nice variety of puzzles, and has a map, diary, and clues to help along the way. I look forward to more games from this developer.
There is one rather frustrating timed puzzle where the time window is far too small to solve it before the timer runs out, although a skip function is available. I would prefer a longer, and more fair, length of time to solve this puzzle myself rather than having to resort to skipping, and this is a suggestion for a future update.
This one small detraction is not enough to subtract from my enjoyment of the game in general, and to prevent me giving it 5 stars.
DavidN1953 about The Lost Fountain, v1.0