Thank you for your comment! :) <3
I agree with everything you said! The bottom-right CG is something I've wanted to change for a while, not only to make it less opaque when there's something behind it but to make it more lively too. A larger variety of gear is on the to do list as well!
Performance-wise, I'm not sure on what could be causing it but you're not the first to tell me this. I'll try to optimize the code somehow.
If it's not an issue, could you send me your CPU/GPU/Memory usage so that I can understand what's causing the stuttering? If it's CPU I might have to work a lot on my code, but GPU is just a case of lowering texture resolution over the project's files.