The wording "If this kickstarter is funded, we are going to make a software product [...]" sounds like you haven't even started making it yet, which is immensely discouraging to potential backers. Maybe change it to "we are going to release" or "we will be able to finish" or something similar?
With a lot of fairly basic features locked away behind a paywall (Pro), this seems rather unappealing to me. I dig the concept of an online image editor with seamless uploads to Imgur and the like, but paying ~$5 for what is essentially the ability to use the equivalent of a free app (most of the Pro features are available in free image editors) without having to install it just doesn't seem right to me. I'm all for a Pro version, but I think in its current form, it just hobbles the basic editor to the point of nigh uselessness. I'd love to see some of the Pro features moved into the Basic version, and other features added to Pro. I think keeping animation-related features in Pro and "productivity" features like multiple views is a fine idea, but having to pay for things like layers, transparency, smudge, and indexed palettes will just drive away the people who should be your core users. Monetize the social aspects (storage, featured posts, etc), not basic features.