You've gotten used to finding buttons, now try finding a chest! A chest is bigger, so it must be easier to find, right?
In each level there is a hidden chest that you must find. In the chest there is a key. Take the key and you win.
A chest may be bigger than a button, but it won't be so simple to find! You will need to think a little to succeed.
Some levels will require a bit of parkour skill.
Good luck & have fun!
(P.S. I'm from China and my English is very bad. Sorry).
