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