The shop update

Stuff added:
-the pause/shop

-currency system

-Characters: Cucumber, Lemon, Tomato,Strawberry, banana

-Waves of enemies(3,4)

-2 new upgrades: Max hp upgrade 1, Luck upgrade

-Melon, Cucumber, Lemon and Tomato are obtained from Shop

-Bags of money that randomly spawn

-messages in the corner of the screen which show the currently weapon and wave