Hello, nice looking product and great copy. 2 points:

1. Make your screenshots english too, keeping the code structure and copy consistent. Unless you want to highlight i18n. But seeing Portuguese and English mixed sticks out to someone like me with a mildly severe case of OCD.

2. Can you mention the language I can use to hack or export the source code in? I assume it’s javascript but spelling it out at least once on the frontpage seems appropriate.

Good luck with it!