+1 that your tiers are about 50x too high.  Rethink your prices in millibits.
The way crowdfunding works is by getting a ton of people on board for a low price.  Look at the Humble Bundle for a different model.  The latest bundle has sold over 160,000 copies so far at an average prie of $4.41.  That's over $700,000, and they accept bitcoin too.  It seems that you are looking down your nose at piddly little sums, but those small amounts add up.  I doubt you'll get 160,000 pledges through this forum though.  That's why Kickstarter is the place to be - traffic.  But very few people are going to toss their bitcoin around because the price is so volatile.  It's not play money.