I have a great ear and am terrible at reading sheet music. Fine if you aspire to be a rock guitarist. Not so fine if you aspire to be a classical pianist.
Funny, but I'm final tired of my poor sight reading and have set a goal for 2025 to average one hour of piano playing from sheet music per day.
And I agree...a "mess around" mode on the app would be great. Feels almost punitive when I make a mistake.