The majority of these trials are relatively straight forward, and can be done in 5-10 minutes, with a bit of replay practise as well (such as the chipping close section). The really tricky challenge is when you have to play the "ginger ninja", notably because you are so short off the tee, and as such some of the holes are actually tricky to even get to in 2 to have a chance at a birdie putt. You need to spin the ball forward at all opportunity to maximise length! What i did was keep practising the first hole, and would retry until i won that, and so at least started 1 up. Here a good drive is essential,and second can reach the green, but keep it left to avoid the bunker on bounce, and use spin to kick it forward and right towards the pin. The second is a par 3 and so also a really good chance here to knock it close and win with a birdie. For the rest of the holes, i just tried to hang on, and match ginger ninja. Also, be patient as ginger ninja can be erratic in quality - the first time i tried he shot -3(!), whereas when i eventually won he shot only -1. If he starts badly/well it seems to continue in that vain, so if he sticks it 1ft on the first for birdie, might be worth retrying straight away!! Good luck!