Here is the full list of all 19 LOVE achievements.
Beat the game on Normal or Better
Took the higher path on Level 10.
Bounce 60 Times
Take the most efficient path through Level 2 without dying
Successfully take the Level 3 Shortcut without dying
You only live 999 times.
You only live once.
Climbed a Machine in India
Stay clean while making your way through Level 6
Took the lower path on Level 10.
Placed 250 Respawn Points
Get a C Rank or Better
Get a B Rank or Better
Get an A Rank or Better
Get an A++ Rank
Beat the game in Speedrun Mode in under 12 Minutes
Submitted Speedrun Score to the Steam Leaderboards
Beat Level 8 without meeting an untimely demise.
Find the secret hidden in the depths of the Slow Tube