Hey, thanks for trying it out.
Yes, it is active to receive rewards. But only the games marked as "Crypto Rewards" will take your score to the Hive Blockchain. Rest of them are either for practice or fun. You can take screenshots and post your practice results but it won't officially be posted through our app, and such puzzle games won't show up in leaderboards either.
The one you solved above was marked as "Play for fun". Puzzles that are eligible for crypto rewards are updated daily, and valid for 24 hours. After that they become available for practice or as play for fun.