Here is the full list of all 12 PieceFallVR trophies - there are 8 bronze, 3 silver and 1 gold.
Complete the game without using hints
Complete the game without failing a puzzle
Complete the Zen island
Complete the Polar island
Complete a puzzle by rotating a piece at least 12 times
Complete the Mirage island
Complete the Farm island
Pass a puzzle after failing it 5 or more times
Hold X to drop a piece til it hits the ground
Beat the developers' record completion time of 9 minutes and 25 seconds (Expert mode)
Complete an entire run of Expert mode
Look at the hot air ballon whilst it's behind you.