I think overall that the store looks great but there are some initial parts of the website that strike me as potential reasons why you might be getting that 65% bounce rate.
1) The landing page seems a bit cramped, there are definitely some sections I would give more margin on, or put on a separate page.
2) The fonts could be a bit more aesthetic. For example, the text of the two products listed at the top of the landing page are a bit hard to read due to their size and color.
3) Related to number 2 would be to perhaps add a button for "Shop Now" instead of having it in the same format as the products' titles. This would make it significantly clearer to the customer as to how they can exactly navigate to the product of choice.
There are a few more things that come to mind but those are some initial impressions I personally have as a developer. I do think they are relatively quick and easy fixes to implement, though, and again overall the website looks really well done.
Hope that was somewhat helpful!