Prevent users from submitting a fake game result

[ltfschoen]

Users could slow their CPU speed down to make it easier to win.
Possibly record the timestamp when the user starts playing and when they finish, and how many obstacles they cleared, and compare that with the actual time between the start and end blocks they played.
Send block hash of the to the server and verify its valid

could restrict each account to play once per day (approx x blocks) but we don't want to force people to have an account with an identity or require a payment to play

only allow a win if winning score was higher than y, otherwise a lose (prevent spam)