So a couple of points.
I accidentaly clicked on the send envelope few times before I noticed its not a zooming button to the requirements but a send button. Some final review screen before sending it would be nice (not expecting it in the span of a Jam, but it would be lovely to have it in a "full release" ) or at least "Are you sure its done?" popup.
It would be lovely to be able to drop things you accidentaly picked up. I know you can pick another thing which replaces it but... you know what I mean -> quality of life.
The fact its not prepositioned but placed by hand makes it difficult to know if you actually messed up or if the game just can't tell that it is correct. As Petra wrote - some feedback on whats wrong would be nice.
But I have to praise the uniqueness of the mechanics. Good job.