Here is the full list of all 18 Twixel achievements.
You died within 6 seconds. Are you even playing?
Got more than 60 seconds on Pixel!
Got more than 60 seconds in Vector!
Got more than 60 seconds in Polygon!
Got more than 60 seconds in Hyper Pixel!
Got more than 60 seconds in Hyper Vector!
Got more than 60 seconds in Hyper Polygon!
You got more than 60 seconds on Twixel! Way to Go!
You viewed the credits. Go hipster!
You decided 2D is better than 3D. Much Retro. Such skill.
You got more than 90 seconds on each level and decided to start all over again. You truly are a legend.
You viewed Dan's website. Congrats, you now know a little more about the developer of Twixel!
You viewed Rob's website and now know more about his music.
You viewed the special thanks screen.
You've killed over 100 Pixels so far. You monster.
You came back to Twixel 10 times. Thanks!
You've killed over 1000 pixels. Are you some kind of professional hitman?
You came back to Twixel over 100 times. You truly are a legendary supporter.