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