Since there are mysteriously no instructions on Neopets for playing Yooyuball this year, that I can see, here are my tactics:
1. Use the 1+3 or 3+1 formation. For this walkthrough I use the right to left direction of play.
2. Press Space to skip the animation of the Yooyu emerging. You can tell what kind it is once gameplay starts by its colour.
3. Hover your mouse briefly over a player to select it (it will get a white circle around it). Then move your mouse to indicate where you want that player to move. The player will always run towards your cursor.
4. Allow Jelly World to grab the Yooyu, then simply walk your middle front player straight into theirs and he'll grab it back. If the enemy striker passes sideways, use one of your backup players instead. If he passes backwards, he will immediately have it passed back to him and will then pass it forward... straight into your striker. So now you have possession, and we'll call this player Striker A. To keep the ball, just avoid being tackled face-on by any opponent.
5. Bear north and then west, making quick diversions if you need to to avoid being bumped from in front by opponents. See the white star shape painted around the goal? Aim towards the northeast point of that star. Stand Striker A on or close to that point and quickly turn so that he is facing the *southern* corner of the goal, and click to have the player shoot the Yooyu towards your cursor. Your aim is to fling the Yooyu diagonally right past the goalie's nose and tuck it into the corner before the goalie intercepts it.
6. If you miss, don't worry. Move Striker A to a point about 2cm in front of the north corner of the goal, and leave him there by quickly skimming your cursor over a different player to select him - pick the one that's now nearest the Yooyu. That's your new striker (Striker B). Have them grab the ball (by charging straight into the enemy who has possession, if necessary) and then try again from the south.
7. Some of the Yooyus are unpredictable and frustrate your tactics. The Darigan Yooyu is plain annoying. The snow Yooyu is one of the hardest - it moves too slowly to fly past the goalie without being intercepted. To deal with this one, follow steps 2-6 but instead of making another direct shot, use Striker B to pass the Yooyu from the southeast star point to Striker A, who's now standing right in front of the undefended north corner of the goal. Striker A should now be able to tuck the ball away while the goalie is still trying to defend against Striker B.
8. The game is fast and can be difficult. Professional football teams don't score every time they shoot, either! If it's not working and your players are all at the enemy goal, your defence is weak - tap the Shift key and all of them, except the one you're controlling with the mouse, will wander meekly back to their starting positions, ready to grab the ball if Jelly World gets it near them.
9. Practice makes perfect.
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