Use [Left] and [Right] arrows to steer the boat and [Up] arrow to move. Press [F] to start fishing once you are out of the port. Use [Left], [Right], [Up] and [Down] arrows to move the fishing rod and catch the fish. Move to the green area to sell fish. Move to the red area (with enough money) to buy upgrades.
CURRENTLY UNDER WORK: KINDA BROKEN BUT PLAYABLE Different fish give more such as the 'Big Fish' or the 'Rare Fish'. Your boat will change slightly if you have fish; remember to sell them! The red area will be a store eventually, to upgrade. More will be added, such as selling fish for money and possibly upgrading your boat. (Also, I've never been fishing lol) UPDATE 1 (5/3/17) -Shark removed, can now sell fish for money (1 fish = 1 money) UPDATE 2 (7/3/17) -Store implemented, you can now upgrade boat size and fishing-rod level ( max levels for both are 2 at the moment) -Map changed, whirlpools removed