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