WordPress theme feedback

Hi! We’re just finishing up our first WordPress theme and we wanted to post in on the forums to see if there is anything we could improve before sending it to be reviewed.
One of the demo is: http://serotonin.collision.studio
The theme’s goal was to be as minimal as possible and now we’re afraid we’ve made it to minimal. But we love the design.
I don’t know how the review process is but I suppose the code matters as much as the design.
Here’s a screenshot of the code, it’s crystal-clear:

And we have some functionality directly inside the theme. like underline searched word and similar search words but they are too small to create separate plugins for them (I suppose).
Anyway what do you guys think? Can someone give us some feedback? Thanks.