Complete the following tasks to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", then "My profile", then "View all my games", then the game and view stats.

All Aboard!: Create a conveyor belt of 10 signs.
All Signed Up: Place a sign on every square of the credits level.
Average Joe: Complete all medium levels.
Back And Forth: Create an endless loop in a level using two directional signs.
Clueless: Fail a level 15 times in a row.
Convey Away: Create an endless loop in a level using a conveyor.
Easy Going: Complete all easy levels.
Endless Telewarping: Create an endless loop in a level using a telewarp.
Eternally Hard: Create an endless loop in a Hard level.
Hidden Chicken: Find the hidden Toki Tori statue.
In the Right Direction: Complete all tutorial levels.
It's a Hard Block Life: Complete all hard levels.
Loop de Loop: Create an endless loop in a Medium level.
No Hiding Cubism: Complete all hidden levels.
No Need to Rush: Create an endless loop in an Easy level.
Number One Savior: Lead 1111 cubes to their exits.
Pile Up: Make 6 collisions at the same time.
Sleuth: Find all hidden levels.
That's Different: Solve a level different from how the hint system suggests.
Tracker: Find a hidden level.
Traffic Control: Complete a level with signs to spare.