Thanks a lot. That helped. You are right, the game is not yet Alpha. I fixed the wording here. Your other comments will be addressed as the game evolves.
A few technical notes: the cannons are usable, except there's nothing yet to shoot. I added the instructions how to shoot them in the game's description here. The oil becomes brown (goo) if it gets mixed up with fresh water. Currently it happens instantly and irrespective of proportions, so yes, it may look a little odd.
Thanks again.