 The first mistake incurs a time penalty of two minutes, the second mistake four minutes, and each following mistake eight minutes.Initially, the player can choose from an "easy mode" of 5×5 and 10×10 puzzles, and Levels 1–4 of 10×10 and 15×15 puzzles.As the player completes puzzles in the standard levels, levels 5–10 and an extra level can be unlocked, with puzzles up to 25×20 in size.