The teeny tiny area for upgrades is crazy. I think you just gotta make the whole game taller.
Otherwise, you put a lot of work into cloning The Perfect Tower but changing all the details. Good job I guess haha
I originally discovered The Perfect Tower on Kongregate (https://www.kongregate.com/en/games/xmmmx99/the-perfect-tower) but I guess the official page is https://www.fs-studios.com/games/perfecttower/.