Here is the full list of all 19 LOVE achievements.
Placed 250 Respawn Points
Find the secret hidden in the depths of the Slow Tube
Stay clean while making your way through Level 6
Beat the game on Normal or Better
Took the lower path on Level 10.
Took the higher path on Level 10.
Bounce 60 Times
Climbed a Machine in India
Successfully take the Level 3 Shortcut without dying
You only live 999 times.
You only live once.
Take the most efficient path through Level 2 without dying
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.