Here is the full list of all 50 Doughlings: Arcade achievements.
Bounce ball from hero 5000 times
Bounce ball from walls 10000 times.
Fully upgrade Morpheus.
Fully upgrade any hero.
Save 100 Stuck targets.
Catch 100 balls with Robo
Show Off with Morpheus 100 times
Heal 500 Red targets.
Destroy 100 Petrified targets.
Morph 100 times.
Show Off 100 times.
Complete 1 secret level.
Heal 500 Yellow targets.
Heal 500 Green targets.
Heal 500 Blue targets.
Die 10 times.
Complete a level by clearing the screen before the time runs out.
Get your first 3 stars.
Upgrade any hero with one slot
Banish 100 Ghosts.
Complete 50 levels.
Complete 75 levels with 3 stars.
Complete 75 levels.
Complete 25 levels.
Heal 50 Flu targets.
Heal 50 Psychos.
Morph 75 times to Bedrock.
Morph 75 times to Gunner.
Morph 75 times to Robo.
Morph 75 times to Smash.
Morph 50 times to Spook.
Morph 75 times to Webster.
Shot 500 bullets with Gunner.
Shot 50 Killers.
Show Off with Bedrock 50 times.
Show Off with Gunner 50 times.
Show Off with Robo 50 times
Show Off with Smash 50 times
Show Off with Spook 50 times
Show Off with Webster 50 times
Unlock all heroes.
Fully upgrade Bedrock.
Fully upgrade Gunner.
Fully upgrade all heroes.
Fully upgrade Robo.
Fully upgrade Smash.
Fully upgrade Spook.
Fully upgrade Webster.
Teleport your ball 50 times between wormholes.
Complete all Secret levels.