Taking it easy is just right

Puzzles are fun. I think the ad frequency is on the lower side, and I've never really noticed them during gameplay. It's a game where you solve puzzles, get points, and then use those points to enter a lottery. The points you get vary depending on the difficulty, but there are also options to enter with just 1 point, so I recommend it. If you keep solving puzzles, you'll also get hidden quests (like 'complete X puzzles') and earn a lot of gems. If you're stuck, there's a hint function (which automatically places pieces) if you watch an ad (slightly longer than forced ones), which is just convenient. I've only been playing for a few days, so I can't say for sure, but I've already gotten 6 PayPay points. There are also series versions, so I'm thinking about trying those out too.