You assume He made us imperfect but why do you do so? God didn't make us ominscient and omnipotent, so He made us imperfect. Since he made us with imperfect skills, knowledge, etc, He can't justly expect us to behave perfectly. So if we behave well enough, with Good Works, then in His Mercy, I think He'll allow us into Heaven on that basis.
Your use of the word "perfect" and "imperfect" is a problem for your thinking because you are doing something called 'equivocating'. The word "imperfect" in one place you use to mean 'incomplete' in terms of knowledge. In another place you use the word 'imperfect' to mean 'immoral'. I agree that God did not give us complete knowledge of everything. You and I stand together on that one. But we are not talking about that. We are talking about God making us "perfect" in respect to our moral capabilities and here we disagree. I say that God made our first parents 'perfect' in their hearts and minds and without sinful desires or thoughts and with the ability to obey him perfectly or to choose to disobey him. Our first parents decided freely on their own to disobey God and thus corrupted their perfect moral natures in the very act of deciding to disobey. That action on their part is what corrupted all of us. God made our kind so that in the hands of our first parents was the responsibility to pass down to us a perfectly moral nature with perfect moral impulses or they could disobey and corrupt not only themselves but all of us. This is called 'federal' responsibility. You may disagree with God's right to create the human race in such a way that in Adam's fall we all became sinners by nature since Adam had the responsibility to keep us pure. But take that up with God - it is what He reveals in the Scripture. Read Genesis 1-3 and also what David says about our natures in Psalm 51.