Simple drawing program

This is a very simple drawing program and thus only has one brush (solid circle), four colours (red, green, blue, yellow), an eraser and a brush size preview. 

Controls:
Click on a colour to select it.
Hold down mouse button to draw.
UP and DOWN arrows change brush size.
SPACE clears the canvas.  

NB! There is no undo feature so be mindful of your brush strokes and enjoy the happy accidents!

This project was done as part of an Intro to Programming class @ the NYU Game Center.