Thanks for playing! We've gotten a lot of feedback about movement happening too quickly so that's definitely on our list of things to improve if/when we update the game. We didn't want to force you to "tap, tap, tap" every time you want to move, but allowing the player to hold down the button means they either move super quickly or the game looks choppy. It's hard to find a middle ground, but we'll definitely try to find a way to improve that aspect when we update the game.
Thanks again for the feedback!