Board Thread:General Discussion/@comment-36892186-20190821205752/@comment-39851000-20190821213030

Yes, you get ice creams when you explore locations: 5 for premium rooms and 3 for non-premium rooms. You get the prizes at 50, 150, 300 and 500 ice creams. If you play enough, you can get all the prizes without paying anything.

The prizes are nothing special, but the mini-event lasts four days, so you'll probably win at least one just playing normally. As a little bonus extra it's actually kind of nice.