The CRx grid game with local bot play, hints, fast chain reactions, and several board sizes.
Play CRx Asteroids
A compact arcade shooter: move, dodge, shoot, and stay alive.
Launch Concentration Grid
A focus drill: find and click the numbers in order as quickly as you can.
Start Factorization
A mental arithmetic race built around prime factorizations.
Practice Eigenvalues
Compute 2x2 matrix eigenvalues against the clock.
Solve