MY bad I read that as PlayMaker an rpg creator. I am sorry. I would have to defer to others on this.
Original Mistaken message to follow:
It mentions all game engines and what not, so in my opinion that is legit. Just using precode and packages are restricted. HOWEVER as I am not familiar with this package, we have Text Mesh and such for Unity. SO something similar would be good, but not a preset package such as an RPG starting kit or something.
"
- All game engines (and frameworks) are allowed"
Would include Gudot, and many many many others.
p.s. I think in the general sense probably not, but we are in a new age of games and programming. IE Bolt is a visual scripting language as well.
HOWEVER something like Dialog Creator or similar, unless that was your entire game, would be illadviced. HOWEVER I am not a fan of restricting someone if thats all they can do, just be up front and list out all the tools you used. IE if someone new , who didn't know a programming language needed a tool to facilitate their game making skills, I would not object. (Personally; In my humble opinion)