Meme Combat 5.1

Fixed an issue on defense system in single and 2 player mode.

Players now lose some hp even if they're defending.

Also, they lose less hp than before to make game more durable than before.

Decreased match timer length(It can be from 60 to 99 secs max).

Added a better cooldown system on attack moves.

P2 in single player mode can attack to P1 again.