You've got a small problem with your CSS. You set a reasonable font-family early in the body{}, and then later in the stylesheet, you overwrite it:

http://www.kickfurther.com//stylesheets/app.css

  app.css:62
  body {color: rgb(34, 34, 34);
    font-family: "Helvetica Neue","Helvetica",Helvetica,Arial,sans-serif;
    font-weight: normal;font-style: normal;line-height: 1;cursor: default;
  }

  app.css:8219
  body {font-family: "proximanova",sans-serif;}

In that one file, there are 286 styles where you go mucking about with the fonts (size, family, weight, ...). This is bad juju since it means a ton of work for the web browser, and hence, a slow site.

The main background image fails to scale on a slightly older version of firefox I tested (18) when resizing the browser window, but it worked when tested with an older version of chrome (24), it scaled properly. I think the issue is with how you're setting background-size here:

  app.css:9203
  .homepage {
    background-image: url(/images/homepage.jpg);
    background-size: cover;
    padding: 5.25rem 0 9.5rem;
    color: #FFF;
  }

A quick check of ff-18 on the quirksmode test for "background-size" http://www.quirksmode.org/css/backgrounds-borders/size.html doesn't show anything odd, or shed any light on the scaling issue. My bet is this is a (old) firefox problem resulting in the usual battle of attempting to support outdated browsers. --I'm not sure how much effort you want to put into legacy support? (It's a losing battle ;-)

The layout/design is intentionally large, spread out, and with lots of empty space. It takes effort (read: friction) scrolling down to figure out what KickFurther is all about due to all the empty space. It has nice calls to action for both individuals and businesses, yet without knowing what it's all about (i.e. the calls come before "How does it work?" section), I question how effective they will be? (i.e. conversions). --You might want to A/B test putting something like the "How does it work?" earlier or even first along with the text over main background image e.g. Initially state the problem you solve (providing capital for inventory to businesses), and how you solve the problem (crowdfunding inventory purchases).

The rotation animation on the logo is a nice touch and it looks good.

It takes too much effort to get to the menu items on the bottom of the page, and they are rendered in a font that's too small. The menu item links like "FAQ" "Screen Process" "How it works" and even "About Us" are deserve more emphasis. --Your concept is new, but the first thing I wondered about is, "How do they prevent fraud?" so who you are and how you screen users should be emphasized more (IMHO).

http://www.kickfurther.com/offers

On the "Offers" page, I'm not sure what to think about the blurred out offer images under the "Upcoming Offers" header. It was unpleasantly annoying to be tricked and driven towards joining your mailing list and/or registering in this way. It might be effective, but...

All in all it's an interesting concept and I've never seen it before. Good luck with it!