Made different level of explosion when the player gets damaged.

getting hit at full health (or when player has a blue heart) now has an increased explosion radius compared to the normal mine blast

getting hit at 2 hearts now causes an even bigger blast that also now kills even the invincible diamond enemies within the radius

getting hit with only 1 heart causes the player to stop moving and let off a huge explosion, killing usually everything on screen for one last burst of score before the score/game over screen