Here is the full list of all 75 Wandersong achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Killed the final boss
Reflect 20 attacks
Kicked a bard 10 times
Reflect 10 attacks
Kicked a bard 3 times
Did 30 dashes
50
Killed the Dream King
Killed the King of Hearts
Charged 100 bolts
Killed the Sun's King
Killed the Moon's Queen
Killed two Overseers at once!
Did a slow clap at an appropriate time
Saved the city from a monster attack
Helped victims of war find a safe place
Did 20 dashes
Did 10 dashes
Did 5 dashes
Did a dash
Killed Queen Order
Killed the Queen of Winds
20
10 with charged sword
Reflect 3 attacks
Hit 5 with a charged sword
Charged 50 bolts
Defeat 3 Spinnies
Reflect an attack
4 things 1 bolt
25
7
Launched by a lightbulb
Charged 40 bolts
5
Defeat an Owl
Charged 30 bolts
Defeat a Spinny
15
40
3
Charge a lightbulb
Charged 20 bolts
Defeat 15 bats
3 Stompies
30
Charged 10 bolts
Defeat a stompy
Defeat 7 bats
Charged 5 bolts
Hit 3 things with lightning
Chain 2 things with 1 bolt
3 things with 1 bolt
10
Defeat 3 bats
Hit with a charged sword
Charged 2 bolts
Defeat a bat
Jump 5 times
Killed Queen Chaos
Defeated the boss of the Ruins
Defeated the Troll
100
7 Stompies
15 Stompies
Defeat 7 Spinnies
Defeat 3 Owls
Spin your sword for a while
Reflect 30 attacks!