Heya!
The theme is unoriginal as we already have many maps themed around snow and a snowmen. Be sure to check our themes list!
The build is lacks detail and depth The shape of the build is very unnatural to that of a snowman. It is too square. It is considered 3D pixel art which is not allowed here.
The parkour fits the length and difficulty for the most part, so good job on that! The jumps are very basic and repetitive. Use more variance such as water, trapdoors, fences, glass panes, heads etc to prevent this.
We hope to see more maps from you in the future.
Have an amazing day! (Magma)