I have just send update for theme, please allow up to day or two to be accepted by review team.
The thing is that main styling is in css/style.css file and that complicates things when you importing. The easiest way to get this done is to in theme copy all content from css/style.css in style.css under current content. Then change paths of images and in functions.php change inclusion of css/style.css to style.css.
I have send you fixed theme on email so you don’t have to wait for update to be accepted.