Add in more window event listeners

This will be useful later to do things such as:
* Pausing game while minimized
* Resuming game when restoring
Merge pull request #195 from dreamteam69/master

Add in more window event listeners
Fixed lives dropping, added in debug toggles
Merge pull request #196 from dreamteam69/master

Resolves #173, added in debug toggles
Bump version, make level changes smoother (time)
Merge pull request #197 from dreamteam69/master

Bump version, make level changes smoother (time)