So as noted on the most recent update, it seems our favorite developer is moving the Kisekae 2 flash game to a new website for hosting.
If you want to keep messing around with Kisekae 2, it would be best to move on over to the new page and start work on there. You can find it here: pochi.lix.jp/k_kisekae2.html
For those that are getting the 403 server error, there's nothing I can do about it since it's an issue with the server where the application is saved on. If the link for the new site is still giving you the 403 server error, go ahead and try the old link. From what I can tell, it's updated to the most recent changes