The effects were too much... It made the game lag...
The jumping, boosting, and ramming of the boats seem to require a recovery after...which is...it takes a really long time to recover... It almost seemed like the fish is unresponsive to the movement of the cursor...
There was a review on your previous version of the game where the reviewer said that why humans and other stuff can pass through the earth, and the fish bounces off of them... In my opinion, that "rule" really annoys me...
The rest of the game was outstanding...
P.S. Are there jellyfish and sharks in the Amazon?