Some close guesses with Sonic 3D, Sonic 3D Blast and Sonic Flickies’ Island. However, this was aMega Drive/Saturn title that used computer generated sprites to give the game that ‘Donkey Kong’ look.
The Game Gear title shown was Sonic Blast. This title used a similar technique to give a 3D style, but played more like a traditional 2D Sonic title rather than the isometric perspective from Sonic 3D.
So congratulations to unleash for getting this week’s game.