I tried publish my app: http://pomidoro.codeplex.com/ on Windows Store and certification failed because: 'Your app doesn't meet requirement 1.1. Comment from tester: This app didn't appear to provide value or didn't seem useful to the reviewer.' Is that means that I do not have any chances to publish it anymore?
No, you can make some tweaks and publish again. Here are some thoughts:
Here is the first post in a blog post series on common certification failures for the Windows Store and how to fix them which might also be useful.
Good luck!