Sure, here is a step-by-step guide on how to play Mahjong Dimensions:

Start the game by selecting a level. Each level has a different layout of tiles.

The objective of the game is to clear all the tiles from the board by matching them in pairs.

To match a pair of tiles, click on two tiles that have the same symbol or image. The tiles must be free to select, meaning they cannot be covered by any other tile and must have at least one open side.

Once you have matched a pair of tiles, they will disappear from the board, and you will earn points.

The game is played in 3D, so you can rotate the board in any direction to reveal tiles that may be hidden behind others. You can do this by clicking and dragging the board with your mouse or by using the arrow keys on your keyboard.

You must clear all the tiles from the board within the time limit to progress to the next level. The time limit varies from level to level, and as you progress, it will become more challenging to clear the board in time.

If you get stuck, you can use the Shuffle button to shuffle the tiles and possibly reveal new matches. However, using the Shuffle button will cost you time, so use it wisely.

You can also earn bonus points by matching pairs of tiles quickly, matching tiles with the same pattern multiple times in a row, and clearing the board without using the Shuffle button.

The game continues until you complete all the levels or run out of time.

And that's how you play Mahjong Dimensions! Keep in mind that the game may have additional features or variations depending on the specific version you are playing.