What are the keys to freedom?

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Mouse controls. Click and drag blocks to move or swap them freely. No need to make matches to move blocks.
Saving Animals :
Line up 4 and 5 blocks of the same color to craft Silver and Gold Keys. Match 3 keys to open a lock. Open all lock on the chest to save the animal.
Making Honey :
Every level has a honey pot. If you fill it, a bee will be able to join you to help you in your quest. Bees are very useful. They can open locks, clean some pollution and attack bosses! Every match gives you a honey drop. However, if you perform combos, you can get more honey drops!
How to make combos? After matching blocks, watch where the blocks on top will fall. If they fall in place to create a new match, this is a combo! Move blocks to plan combos ahead of a match or play quick and move blocks even as others are getting cleared. If you can make several combos one after the other, this builds up a chain. The longer the chain, the more honey drops you receive for every match!
Cleaning pollution :
When a level is polluted, you can't craft keys or gather honey. When matching 4 and 5 colored blocks, green leaves are created instead of keys. Match the leaves together to clean pollution.