65k mesh vertices limit exceeded for WebGL 1.0, which breaks the playable.
WebGL 1.0 has a limit of 65k vertices per mesh to render. Luna currently runs on WebGL 1.0 to support older devices, thus we cannot support meshes bigger than 65k vertices.
Other than this limitation, going near 65k vertices has a great negative impact on the playable performance and should be avoided!
Steps to fix
You can the free tool Blender to remove some vertices using the decimate function. More information can be found here: Decimate Modifier — Blender Manual.