I did actually want at first to create levels you could revisit! I quickly found it would be too much work and most people wouldn't even get to that point in the game, so I went for a more linear style to showcase the mechanics! :>

Thanks for rating! :D

The thing is, the player only really has to change his power scales once in the game, and I thought making the message appear only once you fully committed into the UI would make it feel even more annoying, since you'd have to retry from the start everytime. I just find that preventing the UI from being opened at all when you can't switch makes people find it more responsive once they actually can change scales.
Like you said, it's just a small problem, but I thought I'd just share my thought process. ;)
What do you think?
Anyways, thanks for playing! :D

The UI interface being offset can simply be fixed by playing in fullscreen (It's the first thing written in the description!)

Thank you for playing! :>