I think you underestimate how important small things like this are, look at the reviews here:
https://f95zone.to/threads/haileys-treasure-adventure-v0-2-1-lags.82146/br-revie...
There are five reviews with rating 3/5 or less and four of those mention controls. It's really a shame because the game is exceptional, but many people will get frustrated with the controls and not play it long enough to realize. They also mention the 140 Hz bug which is the 2nd thing you should prioritize imo. (EDIT: you fixed it actually, thanks!).