Don't bother
Response from developer
Try the new version it is a complete revision and absolutely free to download. There are many ways to solve each puzzle and therefore we do not provide a solution that would spoil the fun. The new version shows the strategy a player has used so solve the puzzle so if as a parent you want to see if your son solved the puzzle, he can show you how he did it.
Poorly made
Unlike what it says, it does not tell you when a word is in the dictionary, and it certainly does not tell you if you have completed the puzzle in the least amount of steps possible.
And the question mark icon just moves you on to the next puzzle and does not give a hint or help as a question mark would suggest.
All in all, waste of a dollar.
Response from developer
The new version of this app addresses your concerns and is a free upgrade. The question mark icon was replaced by a pair of dice to indicate that a random puzzle is selected. An icon that is just the letter 'I' is used to designate 'info'. In the new version, once a puzzle is completed the steps used to get to the solution are shown. Thank you for your suggestions.