Recently I have been trying to use different Undertale Engines to make the game. My first Engine that I tried was LeadTuner. But for some reason it kept giving me an error. So I'm thinking "Oh I'll just use another Engine I saw recently!" TML Engine. I have used it before, and it worked perfectly fine before, but recently, I had a bug where if the game was not fullscreen the player would move at 3x speed, plus the text went off the screen. So I have decided to make my own engine, like other fangames do. This engine will not be public, and will be coded in GMS, because I'm pretty new to making games.

EDIT: The testing phase of the engine will be used to make a test game, where frisk goes to the dark world