Prototype changes

Hey ash, I have been testing the game and I have found the following errors

• The mothership is still visible when the player dies
• The text is in the wrong place for player one and two
• The aliens get too low before the game ends (should be at the black line (earth))
• The spaceship can move at the end of the level but is centered on the new level, do one of the other.
• The player sees "Game Over" when a life is lost, needs to be changed to "Live lost" or something else.
• The speed we increse the aliens needs to slow down between the levels. Level 5 is fast, no skill involved, makes the game too easy.
• When playing one player, two player should be disabled, vice versa
• Different colour for player two bullets
• Should we have one or two boss levels? level 5 and 10?