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