Thank you for your comment! As this is a remake of Splitting images, it has the exact game mechanics as the original and I mistakenly assumed that everyone in the zx spectrum community had played the original game.
To add a few things: Bombs can either be thrown out of an open door or deactivated with the water object. Other non picture tile objects can be matched for bonuses, these differ for each level. Matching a fuel can object with a match loses a life!