This fangame is based on Undertale Yellow, so I'm doing a prequel fangame on the events of the orange human. The Act menu works, sort of.
I used this tutorial to get started: https://www.youtube.com/playlist?list=PLzOlFQ5t6DNQLFwgcwuDj7RhDflKqx71d However, the tutorial is unfinished and stopped at the beginning of coding the battle system, so I had to use my Scratch knowledge and learn Gamemaker to do the rest. I think it looks pretty good so far.