Moved logic to gather bullets and children sprites from enemies to a callback function in the PlayState (rather than the EnemyWave class). Fixed JS error in Game Over screen.
Fixed issue with Physics on Floating Mine. All things working as they should with explosion and subsprite collision.
Destructured collision checks so they happen one enemy at a time, allowing for checking of enemy children as a single, separate array
Added floating mine core Sprite
Added a Sprite counter to the HUD for debugging
Added convenience code to display sprite bounds
Refactored mine spike death animation tween.