Game: Building Houses

Here's an internet game that actually requires that you use your brain. It's pretty tough even if you're good at spacial problems and probably impossible if you're not. The premise is to make your "house" match all three perspectives using only the number of blocks given. A little green dot will appear next to the problem number when you match the picture and it will turn yellow when you've done it in the proper number of blocks. I'd recommend NOT starting with 1 as I think that was the hardest. I actually had fun playing this teaser but I'm fairly sick in the head. Enjoy.