No, but I think it would be better as it could have some fancy Kotlin features right there, instead of me adding some as I almost always do with Java libraries (extensions methods/properties/infix methods/builders etc). If you have a good Java Physics Engine I also take it :)
It's for making a simple platformer game, but sadly I'm so bad at maths and collision handling that I always take weeks to create even a simple AABB physics engine, and it's been years like that :/