When I try to playtest my game, I immediately get the error message "'TypeError: Cannot read property 'expParams' of undefined' ". The console gives me the following: rmmz_managers.js:2030 TypeError: Cannot read property 'expParams' of null at Game_Actor.expForLevel (rmmz_objects.js:4151)...
It seems like there are a lot of issues with it if so, and every engine object being named 'Test' confuses things a bit.
Since it doesn't appear that much work has been done outside of nuking default objects (I could be wrong, maybe you've done a bunch we haven't seen thusfar), have you considered a fresh start?
I've been working on status effects since last thursday, and today I finished the core mechanic of Zombie, Teleport, Curse and Recall. Zombie and Curse are lacking a few things to make them complete atm. Teleport though is the "HAHA" spell for some of my mobs, but can "NOPE" at them with Recall.
Humans have such a capacity to assign personalities and love to objects. We do this because we love them. It's interesting then that our fears over AI are that they won't love us back and will instead hate us.