Wow, really great concept. I hope you plan to expand on it. More fish types, different fish animations, more upgrades, more boats, maybe even some skill trees. Would definitely like more of this.
Frustratingly buggy. With the immense lag, and characters getting frozen on strange things such as winning a battle, then all of them just standing there, or beating the final boss and the game hanging on the last screen, makes this game unpleasant to play. I wish there was more attention given to this bugs, because that would make this game really amazing! Sadly, judging from the comments, I don't see that happening.
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Yup that's the direction I'd like to take it. Skill trees make everything better :)