good job, but
I was going to say, it was way to easy to be called impossible, but then I got to the actual last level and that was much harder. I would change the title name though. Its not really hard enough to be considered inpossible. Maybe if you had some moving object to distract you, multi mixed colors and shades to make it harder to concentrate on the right path and other obsticles to avoid touching, instead of just straight lines. Even adding just a circle would make it harder. Maybe even some traps that you have to avoid or needing to find levers or keys to go further to make the level longer without really making the game file huge. Just some things to consider. Good job though. I was going to give it a 6 but I'll make it 7 since the end kinda surprized me.