Looks great! Is it compatible with Java though?

Yes it is. But since the library is written in Kotlin and uses some helpful features from LibKTX, you need to make sure you include the necessary dependencies.
I created a minimal java project in liftoff and had to include

 api("io.github.libktx:ktx-math:$ktxVersion")
 implementation("org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion")

Do you think you could put in on the list?