Tbh that is part of the design of the game as it is RN, it's like old school grid movement. If you just held down the button your noise level would become too much and you would lose in less than a second. I think a good idea would be making if you hold a key for a certain amount of time (say 0.5 to 1 second) would retrigger said movement on that interval tho. I don't think smooth movement fits this idea of a game, it's very obviously designed around a grid system, and would make things like collecting the precious items need to be redesigned entirely as well as the noise system.