Thanks a lot for playing and for the feedback, you are totally right, these will be fixed after gamejam, but it was in short amount of time, and I didn't went so deep into details, after I published it, I noticed too these problems, and I was like "oh damn" XD and for upgrade menu it doesn't work only for bullets damage and player speed, I was running out of time to fix these, but UI will be definitely fixed after game-jam, thanks again :D