Enter these codes into the game genie:
"F7J7G8FD8"--Infinite lives
"FC9036B47"----Faster Dizzy
"G5J73Q8HK"---------Level 2
"H7T554Y9L"---------Level 3
"83J5G62KF"---------Level 4
It is possible to activate both the infinite lives and the speed. After you enter one of the codes the game will start. Just press 'ESC' and go back to the game genie and enter the other code. You can also do this and enter a higher level code.