The UI update is an improvement, but when you click on the upgrades button, instead of having a back button on the bottom of the upgrades page, it should turn the upgrades button into a reactor view button. same thing with the prestige button.
If you're having trouble getting the start screen for character creation to display so you can see and click the buttons change your resolution to 1280x720 if your screen is 1920x1080.
one star until you fix the controls, make a dedicated restart key, and make pushing around the blocks easier. save points would be nice for longer levels but not a deal breaker.