Classic NES Series: Super Mario Bros
Get fireworks at the end of a level
In order to get fireworks to go off after you beat a level, simply finish the level when the last number in the Time is either a 1, 3, or 6. The number of fireworks you get depends on that number. To finish a level with 106 remaining, and you’ll get 6 fireworks to explode. Plus, you get bonus points for each firework that goes off.