I think this could work.
I would say that it still can be better in number of ways
- The colour might be darker OR
- The colour can be some kind of gradient
- it can have outline
Anyway, It is quite good as it is. We will leave the contest open till the end whatever entry comes, but this looks already quite decent.
If you want to increase the chance to win, you might try to modify it OR try the other symbol (tower) or another idea.
Thank you for those entries and in case you leave it like it is, good luck!:)