OK, I've taken a look. I have some comments and constructive criticism.
I applaud your low price per deck of only $10, especially when you're making a 1,000-deck run at USPC. Their per-deck cost must be punishingly high on such a small run - are you sure you'll be covering all your expenses and making an adequate profit? Are you using an American fulfillment service to handle American orders? It would reduce the number of decks that need to be send to you in Switzerland, thus reducing your Customs costs, while at the same time reducing the shipping costs to American buyers as well as the eliminating the requirement on your end to fill out Customs forms for every single American order.
I'm seeing some inconsistencies in the theme. It's a butterfly-themed deck - but most of the wings on the card back are feathered bird wings, even with what looks like a few loose feathers. Why?
I see more of the butterfly theme in the courts - but why then do you show only three of them? Ditch the photo of the poker cheat with the Ace up his sleeve and get clear images of all the court cards.
Its clear from your rewards that you've never offered playing cards to collectors before and you aren't a collector yourself. I say this because you're not offering cards in "bricks" (industry-standard boxes that hold a dozen cards), you're not offering ways to add on individual decks for people wanting quantities you aren't offering and you aren't offering uncut sheets - you're not even showing a photo of the uncut sheets. While the sheets themselves are usually offered only in small quantities because demand is limited and rarity is valued, the image of the sheet is often a good way to show off the entire deck all at once and functions as a sort of ad-within-an-ad for your deck.
The overall design is a difficult sell - it's a basic design with ideas that have been used over and over before. Unframed courts are nice, but you didn't take advantage of the lack of a frame - most artists will make the court art larger with the extra space, whereas you just have more white space. You've advertised gaff cards in an effort to appeal to magicians - but your deck is such a short run, thus so extremely rare, magicians would be very unlikely to use them in front of an audience. You don't even show what the gaff cards are, forcing people to guess! Magicians, however, would actually have been a decent audience to target with a deck that's as minimally customized as this one is; when dealing with general audiences, magicians don't usually go for heavily-custom designs, preferring to show off a deck that's more like the ones their audience members have at home. That doesn't mean there isn't room for customization, but it's easier to perform with a familiar, recognizable design.
Collectors tend to go for more bells and whistles in the design - full-custom everything, tuck boxes with embossing, debossing, foil, custom seals, etc. The only thing you're offering the bells-and-whistles crowd is metallic ink on the cards, something that was exciting maybe five or ten years ago but today doesn't raise as much attention. The box is so plain and unadorned, it's not going to attract many collectors - and you don't even show all the sides of the box. Did you know that there are playing card collectors that collect almost exclusively based on the tuck box design, because they never actually open the box and look at the cards inside? A box like yours wouldn't grab their attention in great numbers.
I wish you luck with the project. In the event it doesn't succeed, consider a serious retooling of the design, taking some of this advice into consideration.