added global vars. tested enemy rendering but need to figure out how to time addition of enemies and remove enemies that moved off the screen. implemented enemy update() function.
fixed implementation of Player class. but still getting an error in the engine. screen does not render currently.
updated enemy and player classes
updated class definitions for enemy and player. enemy rendering and current update working. player renders the bug image.
implemented player movement. implemented collision check. implemented checks for player not to move off of board.
updated getStoneCell() so that collisions are detected from bottom row of stones
added logic for tracking player lives
added background audio
background audio. not sure github will host it.
adding readme. need to implement the prize behavior though, particularly collision detection and score display. may also require refactoring
adding bugs with custom colors
added prize subclass. refactored class hierarchy. added DynamicElement superclass.
fixed wrong text display for score. cleaned up old comments and test lines. added var for bug velocity range.