Graph.IO

Graph.IO is a fun and challenging puzzle game with 20 unique levels that get trickier as you go!

The rules are super simple:

• Color all the lines that want to be colored! ;)
• Want to cross a line without coloring it? Just click on the line.
• Want to color it as you cross? Hold on the line instead.

Think you’ve got what it takes to master all the levels? Jump in and find out!

On level 21 new mechanics are being introduced.

If you wish to just check them, then press "C" on the keyboard and type the level number into the box.