Radium Lux

Radium Lux is a physics-based skill game with puzzle elements. You guide a sphere to each finish line as quickly as possible, steering against gravity and two tractor beams that pull from different directions. Levels grow harder as you progress, and a wrong move can send the sphere into spikes and cause it to collapse.

Changing levels

The 130 levels use static, organic and chaotic structures. Some change their layout during play, as if shifting between realities. They connect non-linearly, and some have alternative endings that unlock other levels; these routes may be easy to find or hidden.

Failed attempts and time spent are tracked until you complete each level for the first time. Once all levels are complete, these records are used to calculate a speedrun best time.

Replays and ghosts

The game records and saves each run that sets a personal best. You can replay your best times, race against them as ghosts, and view the last time you failed a level.

Player profiles

Radium Lux is single-player and has three save profiles, each with its own high-score table. You can display the best times from the profiles as ghosts during play and race to beat them.

Visual designs

You can choose between the classic standard design, a visualizer with backgrounds that move to the music, and design profiles aimed at performance. The moving backgrounds can cause performance problems on slower computers; the performance-focused profiles are intended to let you pursue high scores without those issues.