This is my first time playing an OpenAdventure game, and it was interesting. I didn't get it at first, so I tried a tutorial game, and then it made more sense.
This game at first appears highly non-linear, but it becomes apparent that everything is laid out for you step by step. The way the game works is that you have a map, a list of places on it, a list of people, and rumors on the bottom. You can click on many of these things. Each time you do, you get a paragraph or two of information. Very occasionally, you can click within that paragraph to unlock more areas, or type in a password of sorts to get to a new area or even an entirely new map (there are 2 maps in this game).
At the end of each map there is a self-graded quiz where you type in the answer to various questions. Then, instead of checking your answer, it tells you the truth. I've seen this way of doing mysteries before and it works fairly well here, although it limits your opportunity to correct yourself when wrong or to work on improving a partial answer.
The storyline is that a goddess has a magic cauldron in your village that has an awful curse put on it against any villager who steals it. Yet, it has been stolen. You, a bard, have to figure out who did it and why!
There was a lot of text in this game. I try to avoid using google translate but leaned on it at some points. It seems well-written in french. Due to the quirks of language translation, I had to laugh at google's attempt at translating this (to no fault of the author):
Original: "Il semble que vous allez devoir mouiller vos braies pour continuer la traque..."
Translation: "It looks like you're going to have to wet your pants to continue the hunt..."
Overall, this format seems like it has some clear advantages for mystery games. I'd be interested in seeing how it would work for other genres.