The legacy version used the GameMaker engine, which uses a much older graphics API to render things.
Godot on the other hand uses Vulkan. Vulkan is a more recent graphic API which requires a GPU that supports it. GPUs released after around 2012 should support vulkan fine.
It's generally much easier for small teams to use a more recent engine version and simply not worry about compatibility, so that they can focus on actually making the game. This is especially the case for us, as I'm the only active programmer for the whole project.