Click here to run the app: https://safe-hamlet-64087.herokuapp.com/
The inital, minimum viable product version has a single puzzle in which you place a chess queen on an empty chess board and try to move over and/or land on every square on the board in just 14 moves.
Splash page, information page, game page, rules page, how the queen moves page.
Game board on which you try to solve the puzzle. Every square is a button. Click a square to place the queen, then click other squares to make moves.
Scoreboard which keeps track of how many moves you have made and how many squares have been visited.
Undo, redo, and reset buttons. Full undo back to before placing the queen on the board, full redo to the end of the game (if you made it that far).
Save/load game, with sign up/log in for users to keep their games separate from those others have saved. This is where the back-end database comes in.
Responsive design. Working at least acceptably well for all phones, tablets, and computer screens.
Display of moves on the chess board. The squares which have been visited are colored with a semi-transparent gold overlay, but the paths made by each move are not yet being drawn. (Paths is right there in the name of the app, so that needs to happen.)
Keyboard controls not available for those not using the mouse. Saved gaves: date & time stamp not always visible on smaller screens.
Animation to make everything look better!
Music and sound effects.
Option to display all legal moves during the game, for those still learning how the queen moves.
Additional puzzles for the knight, bishop, and rook.
Second queen puzzle.