Hey! Thanks for checking out my game :D I'll definitely work on those points. The current UI design does need work and the fact that they aren't properly functional is a big problem. Thanks again for bringing that up to my attention and I will bump it up in priority. The quality of it is tied to resolution, may I ask what resolution you are playing on?
As for the bad fps, that's mainly an issue with optimization, specifically for cpu. It has low fps probably because your cpu is maxed out and the graphics card has to wait for cpu processes. A new update coming out soon will be better optimized so I hope it will run better for you.
Not an excuse, but as a note. The game is still in early access and I am a solo developer, so updates might come slowly. Some updates will change major parts of the game as nothing is really set in stone just yet. However, I am grinding both fixes and new features! Please be patient and thanks again for writing!