Thanks to both of you for your help!
I'm too tied up in the rectangles by now to change them. ^^; That's just the aesthetic style at this point. It's also good to hear some ways I could make the input system smoother, but there are other things higher on the priority list at the moment---I'll get to that if I have time and/or enough people bring it up.
All that said, both of your points on the tutorials have been useful. A new update's out with massive aesthetic changes, attempts at early cutscenes, and adjustments to the tutorial to streamline the experience more.
Offer's still up if anyone else wants a part in this: you test my game, and I'll test yours!