v0.5 is out!

This update is much, much larger than any so far. Here's a rundown of the changes:

-New main menu!

-Ambient level sounds! 

-Options for a custom game experience!

-A whole bunch of hats! This was really needed.

-New difficulty settings!

-Some secrets

-Background updates

-A lot of bug fixes

-Balance changes

-Performance unimprovement (v0.4 is available for download if your internet connection cannot handle the absolute size of this file)

More updates soon.