Wow, that's an exciting surprise. Because, usually, when I say that I use BGE or blender in general, I kind of get bullied :D, like not extremely, but lot's of other gamedevs prefer Unity and other modeling software.
Viewing post in What do you feel is the essence of HQ_Resi? (Discussion)
It's not a game engine that can compete with the Unity or UE, but if you know the old blender already it's quite comfortable to work with. At some point I'll probably switch to something more reliable, but for now, I'm good with this option. It's good for prototyping and primitive-looking 3d games. :) Like this one: