Since theres usually some space on the top right, you can put the current level of the building there instead of having to hover over it to see the level that it is currently at. Just a small idea :)
I wonder if it's possible to have an option that when you're character is below a certain health (I.E. 25%) you could have it turned off to the times option instead of the instant one to allow your character to heal up or something :3