Pet Rescue Saga Level 498
Target: Save 12 pets
For this level work on getting the key down quickly, then there is more board to work with.
Use the paint to build up the rocket, and to get pet carriers together, so that they can be opened.
Another way of approaching this level is to find a column where the blocks and pets keep falling and concentrate on getting them dropping in it, not necessarily opening the board by unlocking the key.
With the key still locked, there may be a shorter path for pets and blocks to drop.