I've found a 'secret' in the new "Go Green Get Lucky" levels although it doesn't seem to be useful much of the time.

On some of the levels are wooden blocks marked with a clover. If you destroy a matching clover on the level the wooden block pops also (does not explode). Unfortunately for most of the blocks I've found so far the matching clover is too hard to get to or if you do get the clover the effects on surrounding blocks aren't really useful. The most useful one I've found so far is on level eleven--if you throw a bird all the way to the back and get the pot or the wall to fall backward and destroy the dynamite it destroys a clover next to it which pops a block in the middle of the level which usually starts a cascade that will clear much of the level. Most of the time though I can't find any clover-blocks and when I do I usually get better results by just going the old fashioned route.

Anyone else find anything useful on the new levels?