use 11 block delay on testnet

* this can be removed after v1.1 optimistic start feature iis vetted on Sepolia

contracts/game/src/lib.cairo

@@ -173,10 +173,11 @@ mod Game {
             self._genesis_timestamp.write(1699552291);
         } else {
             // on non-mainnet, use the current block timestamp so tests run correctly
-            self._genesis_timestamp.write(starknet::get_block_info().unbox().block_timestamp.into());
+            self
+                ._genesis_timestamp
+                .write(starknet::get_block_info().unbox().block_timestamp.into());
         };
 
-
         // set the golden token address
         self._golden_token.write(golden_token_address);
 
@@ -3046,7 +3047,7 @@ mod Game {
     #[inline(always)]
     fn _get_testnet_entropy(adventurer_id: felt252, start_block: u64) -> felt252 {
         ImplAdventurer::get_entropy(
-            adventurer_id, starknet::get_block_hash_syscall(start_block - 10).unwrap_syscall()
+            adventurer_id, starknet::get_block_hash_syscall(start_block + 1).unwrap_syscall()
         )
     }