Here is the full list of all 20 Nyan Cat: Lost In Space achievements.
250 enemies eliminated with Nyan Love
Jumped on Gold Platforms 1000 times
42195 meters completed
20 enemies eliminated with Nyan Love
100 Cow items collected
5 times jumped over a doggy in a game
2000 bombs deactivated
A UFO abduction survived 100 times
Played 10 times on Nyan Cat City theme
Tac Nayn touched 9 times
100 bombs deactivated
x250 score multiplier reached in a game
5 pills collected in a game
A UFO abduction survived
Ran 1000 meters without touching any kind of enemies
Played in a world other than Space
Ran 25 seconds without collecting any food
Stayed on the highest platforms at least for 30 seconds
Stayed on the lowest platforms at least for 30 seconds
Played with a skin other than NYAN CAT