Greetings!

I am creating sites and I am good in Maths. I already have an experience in creating games with HASH SUM verifications (games, where result is predefined and you cannot be cheated).
I have two ideas to create.

I plan to make a lottery game with a possibility to win a Lexus GX 460 and with a clear hash sum verification.

Or I can add a new Space game, where you will be able to upgrade your ship, collect trash from a space and extract some good resources from trash. Also later will be added an ability to fight with other ships and winner will get resources, loser will lose his ship.

What is better to add, how do you think?

Or if you can suggest any other Idea, I will review it and create too.