Nintendo 3ds|ds stackable tower

Recently bought a 3d printer and a friend decided to task me to make them a stackable tower for their Nintedo3ds games AND ds games. (Nintendo made the older style of ds games much thicker so he wanted those to fit with the new 3ds style cases). He was very particular in what he wanted so this design was purely catered towards him. I am by no means an expert at making anything as I am completely new to all of this. But I decided to try my best and I came up with this. He had a ton of games that he needed to fit so I made this VERY large for him. He is a collector and plans to get more games so I had to make sure this could forever grow upwards until he just needs me to make a new tower for him. Additionally, the reason it is stackable is purely based off the limited space he had on his desk. HOWEVER, this totally could be placed on its side. I tried my very best to make everything fit as nice as I could and I think I did a somewhat decent job for my first time. If anyone would like to