Nice game. It was not so easy for me to pickup the cargo. Pressing 1 when moving around the cube did nothing at first so I thought the game was broken. Maybe you could build a text popup or something so the player knows when the button should be pressed. Also the button 1 for picking up things is not common in games, most of the time it would be the E or F button.
When exiting the boat it may float away and you will not be able to enter it. The option to make it stuck with a rope would be nice.