I really hate the yellow ones (lemons) especially if they pop up in the last stage and last level.
About that daisy on the last screen of tomorrowland level- that one is just like any other- I have actually hit it once or twice- and it will also come out as a red (saturn) firework too
Getting the timing is an important thing-
I usually tell people to first try to play the game where they just hit every single firework- this gets you used to the patterns that come out- they do change game to game- but there are only a few varieties- and you will learn them quickly- this will get you used to flipping through those fireworks and make the order on the game (that you arrow through) become more of second nature too
Then starting in level one- start waiting for the stars and flawless scores- but like someone else said (two someone's I think

) don't miss if you can help it- it is better to hit two at good than one at flawless and miss the other.
Once you get to where you can hit most of those at flawless you can expand to the other levels- where you wait a little longer
FYI when I first started playing I did better at level three and up then I did at the first two levels- (still do) so many times I'd come from behind and beat people who were winning in level 1 and 2.
And it is just something that takes persisitence and practice. When I first started playing VMK I had a really slow computer and didn't even bother playing the game- when I Got my new lap top a few months ago- I decided to give it a try- and my husband would coach me to keep going- and gave me the same advice I just did here- and before long I was conisistently in the top 5 and that gave me an incentive to keep playing (the credits were worth it) and then I was consistently breaking 200K, then 210 and so forth- where now I usually know I will hit 240k and am starting to finish in the 250's more consistently...
And although I know I can usually do as good and sometimes better with credits in HM- I still am more relaxed playing Fireworks- so you will usually find me there in the evenings when my credits are getting low...