[wereHamster]

Doesn't load for me:

    [blocked] The page at 'https://wagnerandrade.github.io/old-school-racing/' was loaded over HTTPS, but ran insecure content from 'http://github.com/wagnerandrade/old-school-racing/releases/download/0.0.1/old-school-racing.js': this content should also be loaded over HTTPS.
 wagnerandrade.github.io/:1
    Uncaught ReferenceError: Track is not defined (index):32

[mfkp]

Same for me with the HTTPS Everywhere extension. Just click "load unsafe script" and it will work.

Note to author, use a protocol-independent script tag, e.g. //github.com/wagnerandrade/old-school-racing/releases/download/0.0.1/old-school-racing.js

[TD-Linux]

Load it with normal http, not https.

[wereHamster]

Does not work, github.io always redirects to https.

[CJefferson]

I suspect you have installed something like the 'HTTPS Everywhere' extension, which is doing that redirection to https for you. github.io certainly doesn't do it by itself.