GSB on iPad - won't run and can't download

What is that status of Gratuitous Space Battles on iPad? I have an iPad Air and my copy of GSB just crashes. I was going to delete and reinstall but I cannot find it anywhere on the iTunes store. I paid for this app and am really disappointed there is no clear way to address this, and no direct support for it.

Does anyone have any information about GSB on iPad? Thank you in advance for any response.