Module drill 

The drills, and the typing engine that scores them.

Structs

Drill

Rng

A small xorshift generator: plenty for shuffling drill words.

Enums

Mode

Constants

HINT_AFTER

How long a pause before the next key lights up on the map.

LEAN

How much more often a word with your worst key comes up than one without.

Functions

build

leaning

The keys a words drill leans on, worst first: at most three, and only ones clearly behind the rest.

trouble

Keys that need more work than the stage’s middle key: slower, or missed more, scored from just above the middle (near 0) to the worst (1). Keys pressed fewer than five times aren’t judged yet.