Terry's Big Adventure is a platformer created by Gametec and published in 1989 for the Commodore 64, Amiga, and Atari ST.
The game is clearly inspired by The Great Giana Sisters, which was, in turn, not exactly a clone, but similar to Super Mario.
There are 12 levels in total, with colorful and cute enemies, such as snails and hedgehogs. Terry can use a yo-yo as a weapon, which makes things different from the usual gameplay. However, Terry's Big Adventure doesn't pretend to be anything more than a simple and fun platformer with classic 8-bit graphics. Even on the Amiga, where more colors are used, the 8-bit style is clearly visible but perfectly executed. Add addictive music composed by the legendary Allister Brimble.