This looks amazing and initially just pulls you in with the graphics, music and the unique "bubble" concept. I found it a little hard to understand what I have to do. Diving around and shooting at things was fun though.
Thanks. The main goal of the game is to trade until you gain enough money to end, with various little things to do in between. I agree that it should've been made more obvious in hindsight. Glad to hear that you enjoyed it.