Treasure Island Dizzy is a 2D platform-adventure developed by The Highlanders. It was published by Codemasters initially in 1988 for ZX Spectrum, then ported to Atari ST, Amiga, and Commodore 64. It's the second title of the Dizzy series, after Dizzy: The Ultimate Cartoon Adventure.
The main character is an egg who must explore the magic island, collect items and solve puzzles. He needs to find treasures and, if possible, the 30 coins required to leave the island.
The first game was designed and programmed by the two brothers Philip Oliver and Andrew Oliver, but Andrew Graham coded the Amiga version. Allister Brimble remade the music.
You can see that this game was born as an 8-bit game, but unlike other titles, the conversion to 16-bit brought many improvements. It's challenging and fun, try and see for yourself!