If you change your rules to fit withing the steemit guidelines you will get lots more entries. Also if you do not require the upvotes but just ask kindly for them you will always get more.
I'm sure your unaware and did not break the Steemit Guidelines on purpose but this contest is breaking the Steemit guidelines. Please learn that you should Not require Upvotes on Contests. You should make the Upvote part optional not required for entry.

https://steemit.com/faq.html