Your game looks great, it was not what I expected after reading through this thread!
It’s really visible that you spent a lot of time with this and that you’re a good artist. But the issue is, a game that looks bad and plays well can be a lot of fun and a huge success, while a game that looks great but doesn’t play well won’t be fun at all. Art is important, but having good gameplay and constantly good FPS is a lot more important.
No matter how much time you spend with art, you have to make sure that on your minimum recommended hardware (“i3-2100” and “NVIDIA GTX 650 2GB or AMD HD7770 2GB”) the game runs with constant 30 fps. And its honestly a lot of work to make a game like that run good on such low spec hardware. You probably need to spend quite some time with improving certain parts of UE4s source code and shaders and stuff like that for optimizing it best for your specific game to get good performance on such hardware. I think your game is really far outside of what makes sense to do with only blueprint.