Prepare for background updates
Improve enemy drawing logic
Add hills
Add clouds
Modify comments
Merge branch 'feature/background' into develop
Move Keyboarder declaration
Namespace helper functions
Create helper javascript file
Extract Helper functions
Create sprite javascript file
Create keyboarder javascript file
Extract Keyboarder class
Extract sprite class
Extract Player module
Remove whitespacing
Extract enemy modules
Remove Collectables class
Extract Ground module
Extract Hill module