Support
SLYP is made by one person. Write, and you will reach that person rather than a queue.
Before you write
Which device and which iOS version, what the score was, and what you expected instead. A short screen recording usually settles a timing question in one message.
Progress and scores
Your best score is kept on the device and mirrored into your own iCloud, so a second device picks it up on its own. The leaderboard is Game Center's, so a submitted score stays with your Apple account.
Accessibility
Sound, music and haptics can each be switched off on their own. Day, Night and Auto sit in the same menu.