So you're the script writer (I suppose that's basically equivalent to "scenario writer" credits in VNs?)... Well, the details on the plot still seem a bit sparse, but it's easier for me to trust you now.
And don't worry about your English, you already spell better than some of the natives here. Overall, thanks for passing by; I can at least assure you you've convinced me to back the project (I was originally a bit dubious about it).
For the rest, as someone who has seen quite a few of this Kickstarters I think I can try to give some feedback on the Kickstarter itself:
-Mikandi Japan handled their Kickstarter very well, but still during the middle of the campaign they had various moments when failure seemed fairly probable; a key point to overcome that was how they managed to make both MangaGamer and Sekai Project (Arguably the 2 biggest VN localizers in the West) to promote their project. Cross-promotions in kickstarters are generally effective, because one of the problems with this kind of projects is lack of trust on the creators; if you reach to them through someone they already trust, this is diminished. While full-on cross promotion may be a tad overkill for this relatively small project, even something like Sekai Project tweeting your Kickstarter can give you more of an air of legitimacy. Even cross-promotion between indies can be effective. The folks at Mikandi Japan definitely realized it, so they can probably help you a bit with that as well.
-Maybe some more high tiers? Between the ones at 999 and the one at 215 there's a big jump, and considering there are already five people at the later, perhaps some extra tiers at 300 could convince them to raise even more? Attractive high tiers are always a good point. I suppose you simply need to look around, see what people wish and plan if you can make it. This always depends on what you can do, so just take it as a reminder more than an advise.
-Try to point out the fact that most of your team is Japanese a little bit more. While regrettable, there's a lot of prejudice (mostly unconscious) towards Western made VNs.
