In levels containing the red fireworks, you might need to collect the goal amount to pass the level.
To set off a firework, make a match next to it to light the fuse. Each time you make a further match next to the firework, the fuse will burn down a little more.
When the fuse is fully burned down, the firework will fly around the board and land on another item. This can be to remove a blocker, collect an item or even trigger more fireworks!
Fireworks can be used to reach areas that are otherwise hard to get to. Set one off to see for yourself!