Treasure hunt, by 
Party bunny, I hate to break it to you, but this level is medium sized… that doesn’t make it good. It has bad gameplay, no eyecandy, and is boring.
The end.
Keep trying. Spend time on your levels. The average time I spend on my medium sized ones is 7 – 8 hours. If you don’t have 7 – 8 hours, spread them out across long periods of time – let’s say a month. Most levels made by the masters of level making take at least a month. This level, and the Mario 3 Battle probably didn’t take more than a half hour, or maybe an hour. If you are not willing to spend a lot of time on levels, JCS is probably not your thing.