So, this is surely the most addictive game I've ever played:

http://www.newgrounds.com/portal/view/365143

...with this coming up as a second:
http://www.addictinggames.com/bloxors.html

Yes, I am one of the few proud people to say I have completed them both!

Good luck! And please, DO NOT post answers to these!

they are addictive

Not only is that addictive, it's hard.

I really like the second one. That's a lot of fun!

made it to level 20 on the second one and then I had to stop (started getting frustrated)

Just pray that you remembered your passcode on Bloxorz

No I like to play thruogh from the begining

I'm sorry (lol) - I couldn't cope with that! About when I hit 26, each level took me about 20-30 minutes.

However, on The Impossible Quiz, you have to start from the beginning. It's pretty sad when you can memorize a lot of answers.

Gonna have to try that again when I'm not brain dead. lol

Wow the impossible quiz gave me a headache lol.

And speaking of, you guys better finish the Quiz (the sequel is coming out on the 30th!!!)

I couldn't get past question 20, lmfao.

You gotta love those blocks!! Great fun and frustration!!

Well, TIQ2 is out:
http://splapp-me-do.deviantart.com/art/The...31070?offset=50

It helps IMMENSELY if you have taken the first one: there's a lot of insider jokes from the first one posed as questions.
Just some incentive to get you to finish the original