Here is the full list of all 18 Null Drifter trophies - there are 4 bronze, 3 silver, 10 gold and 1 platinum.
Unlock all other trophies
Collect 48 boosters
Unlock 5 palettes
Reach level 6
Kill 200 minions
Collect a total of 600 coins
Unlock 10 ship upgrades
Collect 24 boosters
Collect a total of 300 coins
Reach level 4
Kill 75 minions
Collect 12 boosters
Kill 5 bosses
Play the game 10 times
Collect a total of 100 coins
Kill 25 minions
Dash through an enemy
Reach level 2