Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Bug Free	Enable "bugs" and squash 50 of them while you play.
Code Reviewer	In Free Play, download a file that has a bug in it.
CSS Buddies	Complete a level in co-op.
CSS Master	Complete CSS Mode.
HTML Master	Complete HTML Mode.
Practice Time	Play Free Play for 30 minutes.
Quick Coder	Solve a CSS level in two moves.
Tag Redo	Solve HTML Level 6 two different ways.