Sonic's Secrets: Comix Zone.

To save Alissa Cyan and get a 100% score you must defeat Mortus and prevent her from drowning in rocket fuel!
Lure Mortus inderneath the rocket then jump up and flip the switch to fire the engines. You have to burn Mortus 5 times before he dies! Kill the creeps and a switch will appear next to Alissa, Flip that switch and Alissa will jump out. Get ready for a different ending....