Death Menu, Points, New Upgrades

Added new upgrades, now every level you can choose to heal and one time max health upgrade. Now every time you get hit you get knocked and when you die you get to the death menu where you can see some statistics. For every level, enemy killed and time survived you get points. In the future, you will buy from the main menu upgrades. 

PS. The points you gain in this update will not be transferred to the next update. (Will work on a patch soon)