Simple drawing program

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

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

NB! There is no undo feature. Take your time.

This project was part of my Intro to Programming class @ the NYU Game Center.