Space saving portable mini itx build

I built this pc because I wanted a small portable gaming system that can fit in my backpack. It allows me to take the pc on the go and play games at a friend's house or at a hotel. The only game I played so far on it is Yakuza 0 and it runs great at 60fps considering I am only using the AMD integrated graphics. The case I bought has space for a single slot graphics card, so I plan on purchasing a rx 6400 or gtx 1650 in the future to play more modern games.