Tap a mode on the home screen: a window opens with three choices, then Play.
Starting colors
Starting colors sets how long the sequence is at the first round, from 1 to 5 colors. After that, each round adds one color.
Speed
Speed sets how fast the colors light up: Slow, Normal, Fast or Very fast. Each mode has its own speed by default. The score bonus is ×1, ×1.25, ×1.5 and ×2. Past 5 colors, long sequences also play a little faster each round, up to 30 % faster.
Defaults
In Settings, Default starting colors and Default speed set what the window proposes. A choice saved with Remember for this mode comes first.