Changes for update 0.011

=== New in the game === 

• For the boss there is now a life bar so that you can better behave in battle. 
• The HUD has been rearranged.
• With ESC you can now close the menu.

=== Bugfix ===

• When you die the button for the Main Menu should work.
• The bug that weapons just don't work has been fixed.
• World generation and spawning outside the world should be minimized but still possible.