initial commit
asteroids are moving!
game stops
slight refactor into game#move and added ship#power
ship moves
bullets are firing
bullet collisions remove asteroids
objects are removed or warped appropriately
asteroids are added upon removal
update addAsteroids method
applied css, canvas centered
added background image
update asteroid sizes and random velocities
asteroids span at random spots and can have neg vel
random asteroids don't have velocity into wall
updated to getting dims in, asteroids not spawning properly
asteroids repopulating correctly
changed game over functionality
update velocity so no asteroids have zero vel
add playtime