Thanks for your comment!
I agree, there may be some confusion :) I was planning on more levels to explore mechanics more thorough, but deadline was near and other project pushed too. So I made a choice (maybe, bad one) to remove some of early levels. Playtesting showed little confusion can occur but understanding of mechanics comes through trail and error.
I am thinking of reusing this concept in a bigger project, in which this problems will be solved one way or another. Maybe, I will see your reaction on new one too :)
Thanks again.