In jams, most people don't want to spend a lot of time playing your game, maybe around 3-10 minutes. But some people play it longer than that too (me included) because I want to give everyone a chance. But an idle game, doesn't really have an end so some people might find it boring to have to wait without a specific goal in mind, meaning maybe they'll drop a bad rating, or just straight up ignore your game. I'm going to use my game as an example. The game is around 3 minutes, if you win your first attempt, but it might seem appealing to some people to play it for more than 1 attempt because it's a simple game, and doesn't take too long. And for idle games, completing a collection could take hours (for jam games maybe up to an hour if you're unlucky)
But I hope you got a learning experience from this game, and keep making games you like to develop!