Here is the full list of all 46 Flywrench achievements.
Beat Earth in Time Trial
Beat Story Mode in under 2:50:00
Beat Uranus in Time Trial
Beat Neptune in Time Trial
Beat Pluto in Time Trial
Beat Story Mode
Beat all Mercury levels
Discover Sun in Story Mode
Beat all Venus levels
Crash 1000 times
Beat all Earth levels
Discover Mercury in Story Mode
Beat all Mars levels
Discover Venus in Story Mode
Beat all Jupiter levels
Discover Earth in Story Mode
Discover Mars in Story Mode
Beat all Saturn levels
Discover Jupiter in Story Mode
Beat all Uranus levels
Repeatedly crash on the same color
Discover Saturn in Story Mode
Beat all Neptune levels
Discover Uranus in Story Mode
Crash 100 times
Beat all Pluto levels
Discover Neptune in Story Mode
Beat a level in Story Mode without dying
Discover Pluto in Story Mode
Beat Saturn in Time Trial
Beat Jupiter in Time Trial
Beat Mars in Time Trial
Beat Venus in Time Trial
Beat Mercury in Time Trial
Beat Sun in Time Trial
Beat User Planet in Time Trial
Top the leaderboard in a User Planet
Publish a Planet
Crash 10000 times
Beat 10 User Planets in Time Trial
Beat 100 User Planets in Time Trial
10 players beat your exoplanet
100 players beat your exoplanet
Beat a level in the Editor
Crash multiple times in the Editor
Create a theme