Wordy matchy slidey game

This would be a mobile game with a touch interface.

The player would interact with a grid of tiles representing individual letters with a free space to enable tile movement.

At the start of every level the player is given a goal length of word to create by moving tiles into the free grid space. TIles can be moved in 4 directions and only into an empty space.

The player is given additional points for creating a word longer than that goal length. As soon as a word of adequate length is created, inadvertently or otherwise, the level ends and points are counted. The player must therefore be strategic in their movements to ensure the highest possible word length is achieved.

After the completion of each level set the goal word length is increased by 1.

The diagram below illustrates the allowable alignment for tile matching.