I really don't know how to describe what I thought but I had an idea of having the ability to move, break, ... these stone-blocks ...

OR

... that some stone-blocks are traps which you cannot see at first [like the gems].
Maybe you can only hit them once then fall down and the level resets itself.

=> Could be used for levels that are more difficult.

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Another idea could be another mode | extra mode - a labyrinth where u have to escape in a given time OR within an amount of moves.

So it would be a "ghost-drop" :)
It'd be easy to implement but then you had to choose a direction where you could "end" this ghost-mode - maybe by collecting another pearl again because u would end up in moving endless if you choose the wrong direction :D
It sounds cool but ... I don't know ... :/

Hello everyone :)

@Lewis: It doesn't work for me.
But it's interesting that the game was connected to G+ (in the G+-settings-list) but can't log into G+ in the game.

It's not that bad at all - both of the other Quell+-games are working well on connecting and logging in.
My English isn't that well - I'm from Germany ... xD
I hope you are able to understand ^_^