Thanks for playing hkatt, and for your high praise!
Ideally we would have had a in-game play-by-play tutorial so your issue with the confusion of discovering the shaking mechanic would be more seamless, but glad you figured it out eventually!
We built the idea around our common desire for a cozy game, and "Ghosts" were tagged on after the theme release, but agree that it's quite loose!
Thank you for liking the game! :D