Version 0.6.2 and a Demo

Changelog for version 0.6.2: [list] [*]Fixed Switch 2 leaking in certain cases. [*]Fixed random passthrough causing nonexistent loops. [*]Added a sound effect for clicked buttons, which can be disabled in the settings. [*]Corrected Level 54 (Multiplication) to use non-streaming instead of streaming I/O. [*]Added a simple tutorial in Level 1. [/list] A demo with the first 18 levels is now also available.