Kubrick shuffles the cube by a pre-selected number of random moves when setting a puzzle. The difficulty depends on how many cubies there are in your cube, how many shuffling moves there are and whether you can view the shuffling moves as they happen.
One kind of puzzle has a small number of shuffling moves (3, 4 or 5) and the idea is to solve the cube in that number of moves (or less). This is fun, challenging and quite quick to play.
Then there is the traditional puzzle, with 10 to 20 or more shuffling moves. The 3x3x3 cube has been very well explored and written about, but other sizes are not so well known and understood.
Kubrick also has bricks and mats you can play with. Some of them are easier to solve than cubes and could be fun for children too.
Another game you can try is to find pretty patterns for sizes other than 3x3x3.
Kubrick can be used as a “laboratory” for studying cubes and finding sequences of solution moves, since all moves can be undone or redone to any degree, either instantaneously or at a selectable speed of animation.
It is also possible to save and restore a partly solved cube at any time and the current state of the cube is automatically saved and restored when you quit and restart Kubrick.
On a cube with an odd number of cubies per face, the stickers at the centres of the six faces maintain their positions relative to each other, regardless of how you move. You can use those centres as anchors or guide posts for your moves.
The menu has options to turn animations on or off and to vary the speed of animations. These can be useful when trying to follow a sequence of moves and understand what is happening.
If you are in real trouble, Kubrick has a “solve” action which appears to show God's Algorithm in animated form then reshuffles the cube. Actually the computer cheats. It remembers the shuffling moves and then just undoes and redoes them.
Another source of ideas is the → menu item. One systematic way to solve a cube is to solve the bottom layer first, then the edge cubies in the middle layer and finally the top layer. The demos show sequences of moves on the 3x3x3 cube that will rearrange a few cubies at a time, without messing up parts of the cube you have already solved. One of the demos plays a complete solution of an example cube, using these methods, but it requires over 100 moves.