Soft rejected. Can't figure it out.

Soft rejected twice on the same reason:

“Unfortunately, we were unable to approve your submission because your files were inaccurately represented as responsive and fails to implement the feature up to ThemeForest standards. Please take a moment to make sure that your design implements the feature well for mobile devices as well.”

I’ve been testing on all possible mobile devices and can’t seem to understand what the issue is. Maybe someone here can spot it? Please let me know.

Live Demo

Thanks in advance.

Well, I’ve tested on firefox developer tools.On 320x480 the portfolio entries are not being downsized.

Ohh, thanks for that @ThemesHash, fixed, hope this was the only issue.