This game is pretty weak. I rented it for my 5 year old to play and it was just too difficult for him to work. I played it for 10 minutes and it got boring very quickly. I had more fun watching Wow! Wow! Wubbzy! with him... I say: skip this one.
This game suffers from an identity disorder. It's a pretty bad fishing simulator, not even as good as the old Blue Marlin type games really. It's also a pretty bad arcade game.
It's easy to never lose a fish on your line. A game that you can't lose at it a very boring game. The game lacks depth, it lacks challenge, and it lacks a purpose or plot.
The dozens of tedious screens you have to page through to actually get to the fishing place, including two tiers of menus, adds another level of tedium on top of the actual fishing "action".
The casting motion with the Wiimote is also bugged and weird. The best cast is gotten most reliably by shaking the wiimote and then tapping the B button. Doing an actual casting motion is much less reliable.
I find it hard to say much positive about this game. There appears to be some kind of plot later on in the game, but I could not bear to dig through hundreds of pages of "tips" to read the messages from my "nemesis", whom you apparently battle later on.