Broken GameOverScreenUI/ Croshair/ damageType/ OxygenBar Warnings 
 
- I've tweaked GameOverScreenUI to meet the criteria in trello, however,
I have made some mistakes along the way. 
 FIX: Needed 
  
- Croshair, now works as it should with the absence of the proper
pictures 
- damageType - a new String that defines what damaged you, will carry
out different actions, and influence the death animation and the
gameover witty message. 
- OxygenBar now flickers cyan whenever player has little oxygen left. 
 ADD: Oxygen damage magig, as described in Trello. 
  
 STABLE, except the gameoverscreenui doesn't go away.