Hello, I am here to give you some input on your map.
First off, the parkour. 48 jumps is very short for a map of the HARD difficulty. They tend to have 60-80 jumps, so 48 would fit more of a medium. There is a bit of floating parkour in the beginning which isn't great, so if you could maybe integrate more parkour into your build by making the build bigger to fit 60+ jumps and have most of them connected to the main build. I haven't played the map yet so for the difficulty of the jumps I can't really give an opinion at this point, but the jumps do look a bit repetitive. I know it can be hard to have an upwards-traveling parkour without having a lot of ladder jumps, but maybe more ice/flower pot/anvil/water jumps to make playing the map more interesting.
Then, the build. The build is pretty good for your theme, but the theme itself is a bit lacking. It's pretty plain with it just being essentially a glass block with a face on it. I would try to think of a theme that you can really base a detailed, well-designed map around as opposed to a theme that can be created with a 17 x 17 x 17 cube.
Best of luck on future builds!
-Pyro