5/5
-1: Gets boring, same strategy over the whole game
-1: The end
-1: Missing missions - I'd say ok, lets play on their site, but u dont give any hints about anything...
Like others said, an upgrade sys would be great (bigger bucket for catchin' snails or so...?)
And my second idea is something like unlocking "Part 2" of the game, when I reach level 100 or so where I start my carreer that changes the game into a sim where I can pay pengs for fishing and selling fish and burgers, catch snails and farm whales... ^^