Observers can touch puck to speed  it up
correctly detect observer touching shape, add pucks speed to observers points if touching puck, display observer points numerically (should be replaced by a progress bar that charges up, and can be "spent" on observer interactions)
fix incorrect calculation of speed in previous commit, tidy area, remove debugging statements
some basic logic for observer actions/powerups
fix silly bugs from previous commit - need a little code tidy
shrink powerup buttons
shrink powerup buttons to same size as observer area width
replace numerical display of observer points with progressbar
give action_puck_storm correct name
temp version of create wall - creates a playerless puck
very basic implementation of create_vortex - creates a permenant vortex
increase vortex power, remove after 5 seconds
add puck-puck collision sound
add comments mentioning collision types
keep track of scheduled clock events (new puck and destroy vortex) - cancel event on clear game
added sound effect for speedup observer action
given menus correct names
revert to observer speedup action after any action