You might have already known this but, if you play on wii play the shooting game you try to hit as many targets as possible.  But if you have a second controller and you go only in 1 player mode, you will have two aimers in the shooting range. so you will be able to get more points and it will all go to just your mii.  If you have somebody else who can use  the other controller for you,  there is no doubt that you won't have a good score.  And if ' already figured it out you can click on your character and it will do different things. like if you click one hand your mii will give you a wave and etc.