The object of the game is to make lines of three or more matching vegetables. To do so, you can swap the position of any two vegetables on the play screen by pressing fire then pushing in a direction. Pressing fire again “unlocks” the cursor. When there are no valid moves left then the board is shuffled – until you run out of shuffles, then it’s game over!

Match three vegetables and they are removed from the board, with new shapes dropping down to replace them. Occasionally an immovable block will be dropped. These can only be removed by strategically dropping them until a line of three or more immovable blocks is made. Match four shapes in a row to destroy a full row or line and match five to destroy all matching shapes and get an extra shuffle.

More here https://www.phoenixware.co.uk/product/vegetables-deluxe/