If you want really 5 star from my side then make a change game style like you must add resume button if any player want stop for 1-2 hour later then automatically game destory also high score chance also destory make easy also adds not seen at the time of open mystery box . So add that also make simple that some may play i see who don't resume game like bubble breaker you also add resume play button if play not out he required that also help you game to increase Downloader reactve all her a/c