New version 1.1.5 is already out. :) https://gottcode.org/gottet/
Thank you for the bump request. You can help the maintainer with further information: Does a simple bump [1] work on your system? Chances are high, because a first look on the bump revealed only small changes. [1] https://wiki.gentoo.org/wiki/Custom_repository#Simple_version_bump_of_an_ebuild_in_the_local_overlay
Yes, a single bump of the version is enough
games-puzzle/gottet-1.1.6 is now in the main Gentoo repository, but upstream developers released version 1.1.8 on 2019-08-07.
Bumped in 171e1a73