While we're brainstorming our ideas for the game, we've been splitting out some Ashley ECS systems into a more generic library. Hopefully we'll be able to provide easy-to-use installation instructions and code samples by the end of the jam for others to use these simple, generic systems as well.
The OSS project for these ashley gdx extensions is here: https://github.com/RoaringCatGames/kitten2d-ashley-extensions