Hi ManDam, Thanks for your contribution to OSM!   O took a look a look at your changeset and have a few comments for you.

It's best to try to map buildings separately unless it is very clear that they are connected. I noted a few examples where you have mapped multiple buildings with one closed way (area).

You can also make sure the buildings with 90 degree corners are square by selecting the item and hitting the Q key.
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            Published using OSMCha: https://osmcha.org/changesets/148983555
            