Least favorite of the original 2D Sonic games, but it was the first and pretty much the prototype that SEGA improved on. You really learn to appreciate Spin Dash once you play this game, since its completely absent and you've got no method to hit max speed manually. Only levels I'd say were 'fun' were Green Hill and Star Light Zones. This game's special zone minigame is easily the roughest and cumbersome to navigate.