Gameplay Changes

In this version I have reworked a lot of the gameplay mechanics.

Now the vultures will grab both player(s), spiders and snakes and fly away with them, rather than kill them.
Firing a bullet at an arrow now makes the bullet drop to the ground and the arrow splinter.
Snakes will now poison the player(s) rather than kill them. There are six antivenom potions scattered on each level.
Spiders and bats will now stun the player(s)
The player(s) can now stab boulders, to avoid being hit.
The player(s) now have three different potions available. Be careful though, they are not yet fully implemented and for now their effects will only wear off once you die or restart the level.
A new salesman is in town.
Ooze will now slow down the player(s) rather than kill
Optimized a lot of code.