This is my new BPF! Challenging, but easy to set aside and come back to (often with a new insight). Love the selection of added packs and (so far) dont mind paying a couple of cents per puzzle for the new ones. That said, its a little annoying buying sets one at a time, and it seems like they could sell, say, 5 sets in a pack for a 20-30 percent discount.
For those looking for a hint option, maybe you just need to develop your technique: for example, look for must-be 2- and 3-letter words to pick the low-lying fruit, clearing the letter pile so longer words are more decipherable.
Lastly, this game is much easier to play with a stylus!
ShesUpToSomething about Topple!, v2.0