One mechanic that I love from Mario is the ability to stop the camera scrolling at the edge of the screen, or what feels like the edge of the screen. Go a little bit further and it is not the end of the screen but instead a hidden secret.
Today we implement this mechanic for both the x and y axis.
Intro / Outro music - https://opengameart.org/content/theme...
Play my free app - https://play.google.com/store/apps/de...