diff --git a/src/game.js b/src/game.js
index 0d13167..6a48af4 100644
--- a/src/game.js
+++ b/src/game.js
@@ -2,6 +2,8 @@ import { canvas, ctx } from './canvas'
 import { Level, Rock, Gold, Diamond, Lootbag } from './level'
 import { randomi } from './utils'
 
+const MAP_CLEARANCE_PERCENTAGE = 80
+
 const REWARD_TABLE = {
   rock: 16,
   gold: [129, 543, 2399],
@@ -16,6 +18,7 @@ export class Game {
     this.roundTime = time
     this.time = time
     this.score = 0
+    this.lastGoal = 0
     this.goal = 0
 
     this.level = null
@@ -68,7 +71,8 @@ export class Game {
     this.currentLevel++
     this.time = this.roundTime
     this.level = Level.create(this.currentLevel, this.oh, this.gw, this.gh)
-    this.goal = Math.floor(this.score / 2 + Game.calculateLevelScore(this.level) * 0.65)
+    this.lastGoal = this.goal
+    this.goal = Math.floor(this.lastGoal + Game.calculateLevelScore(this.level) * (MAP_CLEARANCE_PERCENTAGE / 100))
     this.player.hook.clear()
   }
 
@@ -142,6 +146,7 @@ export class Game {
         setTimeout(() => {
           this.currentLevel = 0
           this.score = 0
+          this.lastGoal = 0
           this.nextLevel()
           this.state = 0
         }, 500)