Merge pull request #59 from mkirk8/master

Adding gradient and outlines
Fixed when you can fire
adding play next level in post game screen
Fixed when you can fire
Merge pull request #60 from wroy/master

adding play next level in post game screen
Merge pull request #61 from Gerb11/master

Fixed when you can fire
locking down cannon on pause
Merge pull request #62 from wroy/master

locking down cannon on pause
Adding extra materials for comparisson