Mostly for personal reference

Good Tier

Domino - hold spacebar, fastest game
Biala Tetris - hold spacebar
Bounchy - 1/2/3 bounces then fail
Murfin Chase - collect 1 murfin then crash into the side
Rofling Gold - get 1/2/3 bags and let time run out
Pearl Skipping - can send score after 1 throw

Doable Tier

Mahjong - match 1/2/3 tiles and spam click hint button
Blackjack - win 1/2/3 hands and send score
Candy Cannon - hit 1 candy and miss 5 balls, full power shots fastest
Gumball Machine Madness - beat a different amount of levels then lose on purpose to send score, no idea how scoring works on this but usually fast

Missions:

Circus
Balloon
Puchalla
Bumpkin
Mafia
Pirate Mafia
Hector The Collector
Island
Hospice
Trailer
Penitentiary

Misc. Quests:

Transmogrification
Baspiniar Goals
Farm
Puchalla Inn

Old Battle Avatars:

Flamed
Mount
Impossible

Luck:

Heavy
Jackpot!
Gamble
Sports2

Contests:

Greedy Fairy
Beauty Contest
Ugly Contest

Items/MP/Stuff:

Glowing Egg Enthusiast
Award Winner
Fishing
Ninja
Gazillionaire
500
Armoured
Advent Tree

?:

Fawlt
Sewers
Swimming

New Battle Avatars:

Cowboy
Elder
Elger
Hero
Hot Dog
Hungry Bolimo
Kleptome
Murderer
Muscles
Naunet
Perchuka
Poseidon
Punk Xoi
RIP
Santa
Snot Newth
Tuin
Twigee
Undying
Venus
Villain
Wizadrip
Yaoe
Yeti
Zeew
Zeus

Retired:

Error
Undying
Tricked
Easter
Advent
Christmas
Light Side