There was less frog apocalypse than we expected. Perhaps lengthening the number of rounds, making the board smaller, or adding a certain number of frogs to the board every round,  in addition to the frog event card. 

I am also thinking of hacking the game to make a version where the wind condition is for the frogs to dominate and the humans to be rendered helpless and terrified – would you be OK with that?

PS - for a school project, this is pretty good! Congratulations :-)