Arrow keys or WASD move (two together for a diagonal). 1 2 3 4 cast spells. Space pauses.Swipe anywhere to steer, diagonals too. Tap a spell to cast it. MENU pauses.

Blocks: every pickup turns the square in red brackets into a solid block, and marks the next one. Blocks end the run like walls, and they never go away. Bounds: Closed walls end the run on contact; Open lets you pass off one edge and return at the other.