Fix inconsistencies with player's special moves

[soulweaver91]

• The special move flag should only be switched off at the end of collision checking; if the player touches multiple enemies on the same frame, they all should be damaged.
• Destroy enemies with the special moves by default, regardless of their current HP. Right now, a special move damages enemies with more than 1 HP, leaves Jazz vulnerable, and then Jazz will most likely be damaged by the same enemy on the next frame.