if you want to get maximum money buy up a cheap good (at least 500) and sail around for a few days. when you return to port the price will be really expensive. then sail around a few days again and when you get back the price is cheap again. keep doing this with rum silver and gunpowder and youll be a millionaire very quickly.
the 10 second wait between pressing a then actually turning makes it so you run out of time before you even flip back. when you use your psychic powers to press it so you don't run out of time you end up doing tons of backflips. other than that great game
the 'hard' part about hard is when the game wipes out your 1% risk scouts and you lose half your base almost every turn when there's like 500 zombies to 50 defence
the problem was I got attacked by insanely powerful guys within seconds of leaving the city and I couldn't find the new game button so im stuck in a loop of death :c