first
Update worksheet
Give collision pairs var better name
Improve worksheet
Improve worksheet
rm debugging freq run code bit in worksheet
Update worksheet link to template game
Better title comment for template game
Worksheet tuning
Add screen param to player.draw()
Init player center to center of screen
Make game.update() check body has update()
Make game.draw() let each body type do its own drawing
Clearer code formatting
Make collisions occur if two edges touching
Add canvas drawing reference
Fill in more workshop details to worksheet
Emphasise python 2
Fix typo
Improve prose