Features

Features i attempted other than basic version: 

• ensure when the ball is lost off the edge of the screen, that it resets to the centre and chooses another random direction to move in

• that the paddles don't leave the screen (this can be hard with the physics-based approach)

• add scores (using UI techniques learnt in Practical 4)

• add game logic, so when the first player to 10 points wins the game stops and a UI message is shown declaring the winner

• add further game logic, so that when a game ends it should be possible for a new game to be started (again, with more UI)