The style is great, the cover image looks especially good, I don't think it could have been better. The game as a whole, from a visual point of view, is done very well, there are no complaints here.
A small note on the controls design. It would be more intuitive if the hero assignment menu would also open when you double-click the left mouse button on the quest marker (on the map).
Matching the character's personality trait to the task is a bit of a guessing game of what the developer was thinking. I would recommend using classes or specializations in such cases. It's much easier to logically understand that children can be found by a ranger (hunter) than hot-tempered. And here it’s easier to think about which classes are responsible for what + it suits the style of adventurers, guilds and quest givers. So far, periodically you have to play by the scientific poke method. (but maybe its just my problems and classes would not do any better, than there is need to some additional system to clarify what character is good for what)
Tutorial, I would like to see it. The player immediately finds himself between a bunch of quests and running out of time. It was worth doing at least the first couple of quests with a huge time reserve, and letting the player study the mechanics in a more relaxed atmosphere.
As already mentioned in another comments, I would like to see a progression system with an ultimate goal.
Despite the above, great job, it's not easy to do such a visual style in 2 days with generally finished gameplay :)