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Archive.org has a load of BBC Micro/Acorn magazines uploaded to it, so I searched there and I think I've found the advert you originally saw: https://archive.org/stream/Acorn_User_Issue_No._081_1989-04_Redwood_Publishing_GB#page/n115/mode/2up/search/wizalon
The bouncing wizards game is Wizalon: I'm guessing the text adventure may be Warlord?
Yes! Thank you! I didn't think anyone would get it just from that. Time to break out the emulator...
This is quite a long shot.
There was a collection of games for the BBC Micro advertised in a UK computer magazine in the 1980s, I think around 1986 or 1987. The advertisement was for about 20 different pieces of software, each with a screenshot and a short description. The collection was advertised as "Games Galore for £9.99", but the actual title was something like "Games Collection Vol. 1" It had about 10 games on one disk. None of them had been released separately.
One of the games was a text adventure called something like "The Wizard" or "The Warlock". It started with an animated intro, impressive for the time, showing a 3D grid zooming around before settling underneath ẗhe camera and the letters of the title scrolled towards the camera along it.
I didn't get far in the game itself, but I remember it had a futuristic or sci-fi theme. Near the starting location was a long metal road leading to a city in the distance.
Another game on the collection was a Breakout-like game. You controlled two wizards on a seesaw. When one landed on one end, the other would be catapulted up into the air. If the wizard missed the seesaw, you lost a life. The aim was to pop balloons with the wizards' pointy hats.
I'd like to find the text adventure again, if I can. Does this sound familiar to anyone?