Fair warning on unsolicited advice, but I had a couple of thoughts for the campaign.
First, what is the price of the game on full release if funded? (Personally I'm more likely to back a project if there's a pre-order discount for the crowdfunding.)
Second, are the digital rewards (any/all) going to be IGG exclusives? Again, I'm personally more likely to back a project if some of the rewards are only available through the crowdfunding (for example, another otome VN, The Changeling, that just recently came out included a game guide that was exclusive to the crowdfunding campaign for it).
Overall I thought that the tiers were reasonably priced given what was being offered (and am really excited to be a backer!). Really hope you guys get funded!