The Shark games are among the best in my opinion, always fun to play (even if my finger tells me otherwise).
Medal-wise, this is one of the easier Shark games. Most medals can be grinded by delaying the waterfall jump or focusing on that specific thing (birds, fish, eggs etc.). Only the Trees medal was somewhat difficult to optain, despite having double the unlocks of the Running Birds medal (which is an easy one if you focus them).
Game of my childhood! Laggy in Flash Player Projector.
Creo que los tiburones antiguos no eran asi...