Here are some issues we've come across, and how to fix them (if we've found a fix).
This error will prevent loading of the plugin, and can occur if your bundler doesn't require * as for commonjs modules. To resolve this, try changing the following line:
import * as GridEngine from "grid-engine";
import GridEngine from "grid-engine";
Make sure that you disable the default physics engine's collisions for all the sprites that you add to the plugin. Otherwise you might be observing the inexplicable misplacement of characters.