thank you so much for playing the demo! version 0.2.6 adds a buffer that makes the game much better at interpreting tapped directions, and the next release is probably going to add a very slight pause (like 1 or 2 frames) between hops, which should have the side effect of making it even easier to play the game by tapping each movement, without negatively affecting how it feels to control the game by holding directions.
the way you described wanting the menu to work (offsetting a few pixels down when scrolling up) is how it has always worked, unless there was a bug i didn't notice. i'll have to see if i can try making it slide an extra pixel or two further to make it more clear.
i hope you enjoy the full game once i've finished it!