There are three main power-ups to watch out for: the Magnet, the Chilli Pepper and the Bear.
The Magnet causes flowers to be drawn towards Rakoo if he's running near them. This is especially helpful if you've got enemies running around near them, or if he just isn't able to reach the row they've been scattered on. You can also use this power-up to collect combo-lined flowers, which add to your collection.
The Chilli Pepper sends Rakoo running at a ridiculously high speed, crushing all obstacles and enemies in his path. It's fun to watch - how often do you see a raccoon breathing fire? - but there's also a flip-side to this particular coin. He run so fast that you might miss some flowers along the way. It's best to revisit the stage later if you can, and go at normal speed through the rest of it so you can pick all the flowers up.
Finally, there's the Bear, and he's easily one of our favorite power-ups in the game. Rakoo rides on his back and lures him with food, which sends him on an unstoppable rampage through the rest of the stage. He's helpful at taking down groups of enemies, and that also keeps his momentum going as well. Run over as many enemies as you can while riding him, but don't forget to collect flowers along the way.