@Nekorama Yes, the balls you drop has land into B head causing B body sitting in the ground. That make B able to walk down without stairs.
Well, these kind of levels really need players to be familiar with the programming. Without a hint I have ablsoutely no glue at all.=S
Actually I had no idea how to beat it at the first time, it looked like a normal house, nothing special...but suddenly, a lightning hit my brain, I heard someone who sounded like a senior high. He told me the solution, so I finally beat it!!! ... OK, that's a fictional story, the truth is that I just tried again and again, finally find the solution. But this one is more boring, right? Thanks!!! A creative level!
@Wang Hung Yup, it's boring because it's just in and out. and nice fictional story! Thanks for the awesome review!