It is not working, it just stops?
Try reloading the page, sometimes things go wrong... Reloading the page should usually fix it.

It is not sharing what I want it to, it shares something else?
If you want to share the result of the app, please use the share button under the image. If you share it otherwise (i.e. comment on it or use a built-in share function on a mobile phone), it will not share the actual result, it will share the app. Your result is generated while the app runs, and the share button under the image gets visible after the result is generated. Because of this, if you share it another way, it will share BEFORE the result is generated. So please use the right button :)