Thanks for playing it! There are two optional more challenging areas -- Shipwreck Bay and the Kitty Temple. You might not have found one of those places yet.
I know of Kitty Temple but need to find remaining 2 bells.
I didn't know about Shipwreck Bay, thanks for the info :)
Ouch! collecting last coins is lot harder than clearing Kitty Temple and Shipwreck Bay. Still 1% to go but it's so hard.
Oh well, at least I got these :) :