Hey Blueberry____,
I'm sorry to have to tell you that your map has been REJECTED. Although we don't have any maps specifically themed after the Yellowstone National Park, we have multiple mountain themed maps ("SandMountain", "IceMountain", "DeathMountain") and/or park/volcano themed maps ("Park", "BabyVolcano"). This is why I don't believe the theme to be incredibly original. In my opinion, the build was not executed well. It doesn't look that much like the Yellowstone National Park, it's lacking details, and it's not very pretty. The PK length and difficulty do fit the easy difficulty, though! But, I found it to be rather repetitive at times (primarily on the mountain/fumes bits). I hope you take these criticisms into consideration when submitting maps in the future, good luck!