I'm constantly getting 30 ish points, but have never gotten any special rewards from it. I only got 2 special rewards once when I hit 43 ish points, It got 2 special rewards but 0 certificates. Still got 2 certs from trading in the special rewards, but the minigame itself should have given me 3
Quoted
Trade points for Rewards
- 11~40:
- 2 x Flower Festival Attendance Certificate (209161)
- 2 x special reward
- 41~50:
- 3 x Flower Festival Attendance Certificate (209161)
- 2 x special reward

Quoted from "camagic;588201"
You have to not be a cheap skate like me and pay the transport rune to get the normal score. The free version, by talking to Nickljars, is gimped.
Quoted from "camagic;588236"
Talk to Nickljars Wulfft and then to Waysie Stainbrick for the play nicks game option. This works once a day. Once done tossing, talk to waysie, then to nick.

Quoted from "gigilomann;588189"
Highest score ive got on this event is 68 points. It's super easy and when u get 50 + points you get 5 certifcates.
Quoted from "Borella;588249"
I have never had a problem getting above 51 every time without speed potting it o.O Perhaps ping is too high?
My one minute just seems to pass so fast... >.> 
Quoted from "bilalab;588253"
get more dex?
that shouldnt really matter cuz i have been doing it with my m/k and that toon only ever misses 3-4 times in the whole min.
just spam the button and try to get kodomo first and than newts and finally sheeps. i just cast it and than switch targets before the cast time is up and keep spamming the button and that seems to work fine for me got 50+ pts most of the time.