Hello Truthless_ & Philli2007,
Unfortunately I will be Rejecting your map.
The theme is somewhat original, there are a few maps that have chests in them, but none exactly like this.
The build isn't great as it's mainly a cube. Chests are pretty plain shape-wise, but it would be nice to see a bit more shaping and detail in the build.
The parkour is very repetitive as it's mainly made up of single blocks, ladders & slime. Try to experiment with a larger variety of blocks and items when building parkour, as well as the way you can utilise these. This will make your map overall more enjoyable to complete.
The length and difficulty are good for an easy map.
Thanks for submitting your map! I hope to see more maps from you in the future.