I started with this common one as a test to make sure everything works as intended, and it does!
After creating a profile, adding Ether to your metamask wallet, and linking that address to your fishbank profile, the first step in pre-ordering a fish is sending ETH from your metamask address to the address listed on the market page.
After a few minutes (for me) the transfer worked, and 0.015 ETH was added to my Fishbank account. I went back to the market tab and clicked the cheapest fish to test it out. A minute later I checked the 'my fish' tab and there it was.
FIRST!
Hope to see more people playing this when it launches, looks like it might be fun and hopefully profitable. I don't think it will be that popular in the future, since every actions uses gas, most game developers will want EOS as their platform of choice. But this is the first of its kind, so it should make a pretty big impact. If you want to get started in the alpha stage of the game, here is a link to get an account.
http://my.fishbank.io/go/57318