fixed start screen scroll problem
implement display game over
Merge pull request #10 from jeffkynaston/bug_fix

Bug fix
adds movement to the invader
Merge branch 'master' into bug_fix
Merge pull request #11 from jeffkynaston/styling

Styling
Merge branch 'master' into bug_fix
add functionality to end game
Merge pull request #12 from jeffkynaston/styling

Styling
Merge branch 'master' into bug_fix