My favouite version of the sliding square puzzle, almost perfect. Just need to be able to move complete rows or columns with one move, or at least have the option to. Apart from that it's great! Nice work!!!
15 puzzle is quite good, yet it can be enhanced to move multiple blocks at a single push / touch.
Like this game
You can tap on tiles to move them if you want (go on settings to enable the feature)
A move counter has been added when you solve a puzzle
New leaderboards have been added to rank players who solves puzzles in less movements