Js Project: include canvas. In the game the player start in the middle of the board (screen). The eneimes come from the edges of the screen (outside of the screen).
Player can kill the enimies by firing balls at them. Each time enime has been hit the player score get increase. The player will lose when the enemy reached to middle of the screen, the location of the player, and hit him. In the end player could start over and see his score: