Here is the full list of all 32 Venture Kid achievements.
Defeat 200 enemies.
Defeat a boss with only one heart left.
Beat the fifth level of the game.
Beat the fourth level of the game.
Jump from a frozen enemy.
Beat the third level of the game.
Defeat the boss without losing energy.
Defeat a boss in under 30 seconds.
Beat the second level of the game.
Use the boomerang to collect an item.
Beat the first level of the game.
Beat the sixth level of the game.
Beat the seventh level of the game.
Beat the eight level of the game.
Beat the final level of the game.
Find all the secret treasures.
Jump over 15 spiders.
Defeat one of every type of enemy.
Make an enemy defeat another enemy.
Buy something in the shop.
Buy 5 different items in the shop.
Use the bottle to refill a weapon.
Use A special item to walk on spikes.
Break 100 blocks.
Die 30 times.
Reach a boss room without taking damage.
Reach a boss room without defeating any enemies.
Defeat Teklov part II without collecting all the treasures.
Deal the final hit on Teklov using the shield.
Clear the game on normal.
Clear the game in under 45 minutes.
Clear the game on hard