diff --git a/src/services/GameLogic.ts b/src/services/GameLogic.ts
index b3659a6..dacbe49 100644
--- a/src/services/GameLogic.ts
+++ b/src/services/GameLogic.ts
@@ -201,7 +201,7 @@ export function checkSingleFinish(history: any, accountId: string): number {
  */
 export function calcSingleScore(history: any, accountId: string) {
   let cfgLevel = fetchLevelCfg(history.level)
-  let time = (Date.now() - history.createdAt.getTime()) / 1000
+  let time = cfgLevel.time - (Date.now() - history.createdAt.getTime()) / 1000
   let stat = history.members.get(accountId)
   let combo = stat.maxCombo
   let hp = cfgLevel.hp - stat.errorCount