Really great entry! The visuals are really good, the music is nice and chill and the platforming via windows was interesting and well executed.
The level reset when a window overlaps the player seems a bit harsh as is. Potentially could update it to snap the window back instead of resetting the whole level? And/or a red outline around the player if the moving window is overlapping them?
Also the key in the last level was a bit finicky to grab. I'd get the player character fully overlapping it, but it seemed like having other windows too close prevented pickup detection
Aside from those two things, everything was really well executed. Great job!