First thing that stands out is the fonts. They’re plain, nothing special, nor do they compliment your design.
The navigation, it has nothing to separate it from the rest of the website as you scroll, making it difficult to read.
The headers could also use some improvements in regards to fonts.
It’s a nice attempt, but I think visually there is room for improvement and typography seems to be the biggest.
Also, the thumbnails in the bottom gallery (aligned left) are poor quality and do not do the demo any justice.
Personal note: Not a big fan of the menu once you click the hamburger / mobile icon. It does not compliment it.
All in all, it’s a great start but definitely room for some improvements visually.
Hope that offers some insight. Best of luck on getting it submitted!