Cheat Codes
Press [~] while playing, then type any of the following codes:

Code                             Result
cheat_coal(9999)           Add Coal 
cheat_electricity(9999)   Add Electricity 
cheat_buildings               Add

Best Creatures 
These are the best creatures that you can combine in the game:

Close Combat: Sperm Whale - Scorpion(HP:842 DMG: 32 Defense: 63)
Flyers: 1- Dragonfly - Sperm Whale(HP:423 DMG:42)
2- Hornet - Sperm Whale(HP:732)
Ranged Attacks: Chameleon - Sperm Whale(Range DMG: 23)
(Camouflage - Amphibious)
Gorilla - Sperm Whale(Range DMG:15 DMG:32 HP:832 Defense:32)(Amphibious)

Tip
Try  to  combine smallanimals with big animals instead of
same  sized  animals.  If  you  combine  a small animal with something
bigger  the  small  animals  stats will be multiplied.(Ex: Dragonfly's
Swoop  attack's  dmg is 6 but if you combine it with sperm whale swoop
attacks dmg will be 23).