Do NOT bother with Dragon Swarm as it will likely freeze the game.
Maxed-out Balanced and Maxed-out Spin-Kick is all you really need, and always buy extra lives at the shops.
If you are struggling with the first part of Level 9 as I did on my first attempt, try Maxed-out Training Wheels for extra defense, again Spin-Kick works wonders as it knocks off many enemies off the platform. The jet-pack enemies can be handled with the Spin-Kicks as well, sometimes it helps to jump first. This can help avoid being hit during the recovery from the kick.