Because we need to think to the future generation of coda makers, young girls and boys need to come as soon as possible in our coda doc Then, a solution could be to make them actually play in coda !
Trick them, trap them, and make them understand from an early age that CODA is the place to create and learn from !
Choose your difficulty and… Whack a Mole 
(better in full screen)
PS : Sorry about that guys 
PPS : Post your score in easy/difficult mode 