Hello putinb, I am sorry to say your map is being rejected.
Theme: The theme is unoriginal we have multiple giant mc block themed maps already, and some similar treasure chest related maps.
Build: The build is okay, its accurate to a minecraft chest but lacks creativity overall
Parkour: Its not very varied, and the repetition of ladder and cobblestone wall jumps makes it a slow feeling map! Some jumps were a little too hard for the difficulty overall.
Thanks for taking the time to submit your map, hopefully, you will submit more in the future!
Have a good day, and happy map building- Cele <3