Here is the full list of all 40 Miska's Cave achievements.
Unlock all characters
Unlock all magic bullets
Unlock all spells
Unlock all easy mode caves
Unlock all normal mode caves
Unlock all hard mode caves
Unlock all hell mode caves
Clear all challenges in Bouncing Mania
Clear all challenges in Pop the Balloons
Clear all challenges in Rapid Teleportation
Clear all challenges in Jumper Gang
Clear all challenges in All Monsters Easy
Clear all challenges in Explosions
Clear all challenges in Dashers
Clear all challenges in Quick Runners
Clear all challenges in Surprise Balloons
Clear all challenges in All Monsters Normal
Clear all challenges in Homing Magic
Clear all challenges in Rapid Fire
Clear all challenges in Matryoshka
Clear all challenges in Heavy Balloons
Clear all challenges in All Monsters Hard
Clear all challenges in Spider Egg
Clear all challenges in Rapid Explosion
Clear all challenges in Full of Magic
Clear all challenges in Heavy Jumper
Clear all challenges in All Monsters Hell
Clear all challenges
Travel 100 meters
Travel 1000 meters
Travel 10000 meters
Travel 100000 meters
Obtain 100 crystals
Obtain 1000 crystals
Obtain 10000 crystals
Obtain 100000 crystals
Defeat 10 enemies
Defeat 100 enemies
Defeat 500 enemies
Defeat 1000 enemies