We published a separate Play To Device TestFlight app for PolySpatial 2.0.0-pre.3. It has just been approved by Apple. Here is the new link for it:
Be aware that:
-The version you are using in the editor must match exactly with the version in TestFlight.
-At the moment the icons are the same between this version and the one compatible with the 1.2.3 release. We will work to remedy that with our next release.
-All the same noted issues with the 1.2.3 release apply to the 2.0.0-pre.3 release.
-Peter