The object of Key Slide Puzzle is to unscramble number keys on the screen into the same order as the keypad. Similar to a sliding 15-block puzzle, you move a key into the open (blank) position to reorder the keys. Keys will only move into an open key position along paths marked by lines between the keys. Puzzle variations allow you to select different fixed and random starting positions. There are also two word/phrase variations where you spell a word/phrase with the letter keypad labels. You must guess the word/phrase and then put the keys in the correct order to spell it.