Hi, thank you very much for your message. Yes this set of transitions are for K-Engine. We released a previous alpha version of K-Engine few months ago just to test how the engine works with other people, but it needed more works.
We are still working on K-Engine (we will work forever on it :) ), it's almost ready but we just want to improve some important features of the editor. We are also working hard on other projects despite K-Engine is always in dev everyday.
We will probably upload even a version here on Itch, for sure it will be available to download for free on our website :)
Thank you very much for your interest! :)