Full reset of play.js
Arrow enabled with p2. World bounds work.
Bomb spawning works.
Added bounds to bomb spawning.
Explosion creation added.
Added enemy spawning.
Explosions kill enemies. Score header works.
Added pause and play buttons.
Game Over menu now works again.
Fixed bug with play and pause buttons.
Blast item spawning readded.
Wave power added. Charge animation showing improperly.
Fixed wave charge. Almost ready to be merged.
Added commenting.
Added checks so items don't spawn too close to player.
Merge branch 'p2'