You don’t have to clear the entire field to beat the level 63. All you need is to remove ice on one side and get access to at least 2-3 flowerbeds. Matches and explosions that affect several flowerbeds at the same time will save you moves.
Remember that matches made closer to the bottom of the field increase the chances of getting auto-matches. Save your power-ups and explode several of them simultaneously to charge the Rainbow Blast faster — you can use it to collect drops or flowers.