Precision is a minimalist accuracy game: targets that must be hit exactly, with timing windows that narrow as you go.
There's nothing to it beyond that, which is the point — every failure is clearly yours, and every success is clearly earned.
A minimalist timing and accuracy game — you hit exact targets in narrowing windows, with nothing else layered on top.
Yes — the timing windows narrow as you progress, which is the only difficulty curve it needs.
Yes — tap at the right moment. Nothing to install.