v2.1.0

Made sure all 3rd floor hops can be mantled.
Made 3rd floor obstacles softer and more obviously breakable.
Adjusted some 3rd floor lighting and props.
Modified 5th floor combat.
Game saves after winning 5th floor fight.
Made new ending easier to follow.
Fixed backpack being equipped for new ending.
Removed health beep from ending.
Modified hardcore waves.