Fun with a side order of "eh"
With a pretty minor amount of grinding, you can get all the upgrades fairly easily... which isn't necessarily a bad thing, I don't like games that just cheapskate you for the sake of added difficulty. But it does leave you with very little to do after that but spend your leftover blood on replacing your minions. Would be nice if there was a final upgrade you could get that would let you eat the sharks... they're really more of a nuisance than a threat, since my reaction is never "Oh no a shark I'm in danger of dying!" and always "Oh great, a shark, now I've gotta stop what I'm doing, jump over it, and then sit there doing nothing for a few seconds while my fish recovers from jumping."
I did enjoy the graphics, especially the way stuff shifts and moves around when you upgrade, so I wish there'd been even more of that. But it's also why the ending was so utterly disappointing. I thought a game that had such strange and dark style would have at least a gory or weird final image to go with the ending, but it was just a "You are winner!" screen and a continue button. Complete letdown.
Fun, stylish, but doesn't live up to its potential. The lazy ending alone annoyed me enough to knock a few points off.