Hey, nice work, I noticed this edit since you clicked 'request review'. 

You might have noticed that some gardens are not visible, like https://osm.org/way/1291162453 If you want to try fix this, there is an advanced feature called 'MultiPolygons' which can solve the problem. To use this, select the pedestrian area and the garden, and press `c` to 'merge' them. This effectively punches a hole in the pedestrian area so the garden is visible. There's a good example of this just across the road: https://osm.org/relation/13631905