The seven ranks
Your rank is set by the number of levels you clear in one run. Every tier has its own page with what it takes and how to climb out of it.
Rookie
Starting tier · 3×3 grid from ΔE 7.0
Apprentice
3+ levels (to 5) · 4×4 grid from ΔE 4.5
Mole
6+ levels (to 8) · 5×5 grid from ΔE 3.0
Hound
9+ levels (to 12) · 6×6 grid from ΔE 2.0
Hawk
13+ levels (to 17) · 7×7 grid from ΔE 1.5
Eagle Eye
18+ levels (to 24) · 7×7 grid from ΔE 1.5
Oracle
25+ levels · 7×7 grid from ΔE 1.5