The director's cut version the game is now sold as adds -- among other things -- an all new narrative to the game. As usual with the genre, it struggles with plausibility. It's just really hard to justify huge testing chambers for something as silly as simple puzzles.
Gameplay-wise Qube is the from less hectic end. It's enjoyable but similarly to The Turing Test, there's no high precision requiring fast platforming. You manipulate color-coded cubes of different effects to proceed from one chamber to the next. Activating a green square produces a movable cube while a red square pushes out a pillar up to three cubes length, for instance.
Some of the puzzles have physics involved and I noticed you don't always get the same results from identical starting conditions. A green cube spawned directly upon a blue launcher cube didn't fly to the same place every time. I think it's a slight of problem if the player misses the correct solution in a puzzle game because its physics decided to act up.