If you have always thought of gardening as a relaxing and peaceful occupation, Garden Trouble by Paul Radcliffe of Danbury, Essex should make you change your mind.
The object is to climb a ladder, followed by a second ladder, to reach the watering can at the top of the screen, then descend to ground level and water the flowers - all while avoiding the two monsters which patrol each level. You had better not dawdle, as you have only 27 seconds in which to save your plants from drought.
Press Z and X to move left and right, : and / to move up and down. Garden Trouble will run on the Electron and BBC B.