lumen.

A serene, brain-teasing puzzle about light and logic. Arrange mirrors, prisms, and lenses to steer beams across intricate boards and ignite every receiver. Clean visuals and a calm soundtrack keep the focus on thoughtful problem solving, while steadily evolving mechanics like reflection, refraction, and color mixing deliver fresh challenges without frustration. Accessible for newcomers yet satisfying for experts, each handcrafted level rewards careful observation and clever planning.