Way too easy.
You can take your time arranging the pieces and still have plenty of time left. Also I don't think that Pedobear worries about smokers that much, he has other SMALL things to worry about.
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The puzzles are far too easy.
In fact, they get easier the higher the difficulty goes - that's to say, I score higher on harder levels. The amount of extra time you give to compensate for the extra number of pieces is too much. The addition of a grid which all-too-helpfully snaps my pieces into position makes it overwhelmingly easy, and I lose interest immediately.
Challenge is essential. Never forget that.