Update 1.4

Greetings cosmic travelers!

Release 1.4 is mostly about some small UX improvements. Here's the full change log:

• You can now start slingshotting from anywhere on the screen
• Increased the length of the slingshot to give you more control over the strength
• In-game UI is now white instead of orange, making it more visible against some backgrounds
• All courses now have an icon in the course select, making it easier to find your favourites
• The tutorial glove in course 1-2 is now a bit smarter and hopefully a better teacher
• Added music to the title screen