Hello! Yes, currently MonMae requires GameMaker as an independent. We do have visual editors and are working towards an end goal of being completely standalone much like RPG Maker, but we’re not quite there yet.
Regardless, thank you for showing your interest in the project. In its current state, I believe it’s a little more suited for beginner to intermediate developers, but we’re hoping to be fully noob friendly within a few months :) Developement is quite slow with only a single programmer but we’re sure doing our best!
If you have any doubts about MonMae, please watch some of the tutorial videos linked on the page or reach out to me again, thank you!!