When choosing a board size, it now loads the first level that hasn't been completed (instead of just the first level), so you don't have to find where you left off each time.
This puzzle game is similar to the board game Rush Hour (or Traffic Jam). The purpose of the game is get the blue block out of the grid by moving the other blocks out of the way. While Rush Hour is played on a 6x6 board, this app has three different board sizes (5x5, 6x6, and 7x7), and contains 3500 total levels. With different difficulties of levels and board sizes, there are challenges for everyone.
