To start off with, the password to Welcome_To_The_Game.rar is hashcat, simply enough.
We pop open that folder to get to the next level with, what looks to be, Brainf*ck.
I dropped that into a compiler, but it didn't work. Notably the brackets are reversed, which prompted "why don't I reverse every symbol?" (This can be solved easier with this reverse f*ck tool)
Here it is reversed:
