did a lot of legwork but i think you meant for us to
do one more.

i noticed there was a button right at the exit - i couldn't
understand why it was there at first but now i see what
happened.

you meant for that button to be for an door that is
6 units to the right and 1 up from the exit there

i think you probably hit "D" - meaning the door was
to the right instead of the "A" - to the left of that
square. at least that's my guess

It doesn't affect the ability to finish the game though

Maybe check into it.

Other than that - it's an ok map.