diff --git a/libs/actions.js b/libs/actions.js
index 1924144e..ffe68124 100644
--- a/libs/actions.js
+++ b/libs/actions.js
@@ -162,19 +162,21 @@ actions.prototype._sys_onkeyUp_replay = function (e) {
             core.triggerReplay();
         else if (e.keyCode == 65) // A
             core.rewindReplay();
-        else if (e.keyCode == 83)
+        else if (e.keyCode == 83) // S
             core.saveReplay();
-        else if (e.keyCode == 67)
+        else if (e.keyCode == 67) // C
             core.bookReplay();
-        else if (e.keyCode == 33 || e.keyCode == 34)
+        else if (e.keyCode == 33 || e.keyCode == 34) // PgUp/PgDn
             core.viewMapReplay();
-        else if (e.keyCode >= 49 && e.keyCode <= 51)
+        else if (e.keyCode == 78) // N
+            core.stepReplay();
+        else if (e.keyCode >= 49 && e.keyCode <= 51) // 1-3
             core.setReplaySpeed(e.keyCode - 48);
-        else if (e.keyCode == 52)
+        else if (e.keyCode == 52) // 4
             core.setReplaySpeed(6);
-        else if (e.keyCode == 53)
+        else if (e.keyCode == 53) // 5
             core.setReplaySpeed(12);
-        else if (e.keyCode == 54)
+        else if (e.keyCode == 54) // 6
             core.setReplaySpeed(24);
         return true;
     }
diff --git a/libs/control.js b/libs/control.js
index c5f23449..36bdf40c 100644
--- a/libs/control.js
+++ b/libs/control.js
@@ -1056,7 +1056,7 @@ control.prototype.chooseReplayFile = function () {
 control.prototype.startReplay = function (list) {
     if (!core.isPlaying()) return;
     core.status.replay.replaying=true;
-    core.status.replay.pausing=false;
+    core.status.replay.pausing=true;
     core.status.replay.speed=1.0;
     core.status.replay.toReplay = core.clone(list);
     core.status.replay.totalList = core.status.route.concat(list);
@@ -1092,16 +1092,24 @@ control.prototype.resumeReplay = function () {
     core.replay();
 }
 
+////// 单步播放 //////
+control.prototype.stepReplay = function () {
+    if (!core.isPlaying() || !core.isReplaying()) return;
+    if (!core.status.replay.pausing) return core.drawTip("请先暂停录像");
+    if (core.isMoving() || core.status.replay.animate || core.status.event.id)
+        return core.drawTip("请等待当前事件的处理结束");
+    core.replay(true);
+}
+
 ////// 加速播放 //////
 control.prototype.speedUpReplay = function () {
     if (!core.isPlaying() || !core.isReplaying()) return;
-    if (core.status.replay.speed==12) core.status.replay.speed=24;
-    else if (core.status.replay.speed==6) core.status.replay.speed=12;
-    else if (core.status.replay.speed==3) core.status.replay.speed=6;
-    else if (core.status.replay.speed==2.5) core.status.replay.speed=3;
-    else if (core.status.replay.speed==2) core.status.replay.speed=2.5;
-    else if (core.status.replay.speed<2) {
-        core.status.replay.speed = parseInt(10*core.status.replay.speed + 2)/10;
+    var speeds = [0.2, 0.5, 1, 2, 3, 6, 12, 24];
+    for (var i = speeds.length - 2; i >= 0; i--) {
+        if (speeds[i] <= core.status.replay.speed) {
+            core.status.replay.speed = speeds[i+1];
+            break;
+        }
     }
     core.drawTip("x"+core.status.replay.speed+"倍");
 }
@@ -1109,15 +1117,13 @@ control.prototype.speedUpReplay = function () {
 ////// 减速播放 //////
 control.prototype.speedDownReplay = function () {
     if (!core.isPlaying() || !core.isReplaying()) return;
-    if (core.status.replay.speed==24) core.status.replay.speed=12;
-    else if (core.status.replay.speed==12) core.status.replay.speed=6;
-    else if (core.status.replay.speed==6) core.status.replay.speed=3;
-    else if (core.status.replay.speed==3) core.status.replay.speed=2.5;
-    else if (core.status.replay.speed==2.5) core.status.replay.speed=2;
-    else {
-        core.status.replay.speed = parseInt(10*core.status.replay.speed - 2)/10;
+    var speeds = [0.2, 0.5, 1, 2, 3, 6, 12, 24];
+    for (var i = 1; i <= speeds.length; i++) {
+        if (speeds[i] >= core.status.replay.speed) {
+            core.status.replay.speed = speeds[i-1];
+            break;
+        }
     }
-    if (core.status.replay.speed<0.2) core.status.replay.speed=0.2;
     core.drawTip("x"+core.status.replay.speed+"倍");
 }
 
@@ -1218,9 +1224,10 @@ control.prototype.isReplaying = function () {
 }
 
 ////// 回放 //////
-control.prototype.replay = function () {
+control.prototype.replay = function (force) {
     if (!core.isPlaying() || !core.isReplaying()
-        || core.status.replay.pausing || core.status.replay.animate || core.status.event.id) return;
+         || core.status.replay.animate || core.status.event.id) return;
+    if (core.status.replay.pausing && !force) return;
     if (core.status.replay.toReplay.length==0)
         return this._replay_finished();
     this._replay_save();
@@ -1412,9 +1419,9 @@ control.prototype._replayAction_shop = function (action) {
         return true;
     }
     var choices = shop.choices;
-    var topIndex = core.__HALF_SIZE__ - parseInt(choices.length / 2);
     core.status.event.selection = parseInt(selections.shift());
     core.events.openShop(shopId, false);
+    var topIndex = core.__HALF_SIZE__ - parseInt(choices.length / 2) + (core.status.event.ui.offset || 0);
     var shopInterval = setInterval(function () {
         if (!core.actions._clickShop(core.__HALF_SIZE__, topIndex+core.status.event.selection)) {
             clearInterval(shopInterval);
@@ -2065,6 +2072,7 @@ control.prototype.setCurtain = function(color, time, callback) {
 }
 
 control.prototype._setCurtain_animate = function (nowColor, color, time, callback) {
+    time /= Math.max(core.status.replay.speed, 1)
     var per_time = 10, step = parseInt(time / per_time);
     var animate = setInterval(function() {
         nowColor = [
diff --git a/libs/events.js b/libs/events.js
index fc654e2c..1eb1ad15 100644
--- a/libs/events.js
+++ b/libs/events.js
@@ -432,7 +432,7 @@ events.prototype._openDoor_animate = function (id, x, y, callback) {
         }
         core.clearMap('event', 32 * x, 32 * y, 32, 32);
         core.drawImage('event', core.material.images.animates, 32 * state, 32 * door, 32, 32, 32 * x, 32 * y, 32, 32);
-    }, speed / core.status.replay.speed);
+    }, speed / Math.max(core.status.replay.speed, 1));
 }
 
 ////// 开一个门后触发的事件 //////
@@ -1884,7 +1884,7 @@ events.prototype.closeDoor = function (x, y, id, callback) {
         }
         core.clearMap('event', 32 * x, 32 * y, 32, 32);
         core.drawImage('event', core.material.images.animates, 32 * (4-state), 32 * door, 32, 32, 32 * x, 32 * y, 32, 32);
-    }, speed / core.status.replay.speed);
+    }, speed / Math.max(core.status.replay.speed, 1));
     core.animateFrame.asyncId[animate] = true;
 }
 
@@ -1958,7 +1958,8 @@ events.prototype.moveImage = function (code, to, opacityVal, time, callback) {
     var opacity = parseFloat(canvas.style.opacity), toOpacity = getOrDefault(opacityVal, opacity);
 
     this._moveImage_moving(name, {
-        fromX: fromX, fromY: fromY, toX: toX, toY: toY, opacity: opacity, toOpacity: toOpacity, time: time
+        fromX: fromX, fromY: fromY, toX: toX, toY: toY, opacity: opacity, toOpacity: toOpacity,
+        time: time / Math.max(core.status.replay.speed, 1)
     }, callback)
 }
 
@@ -2016,6 +2017,7 @@ events.prototype.setVolume = function (value, time, callback) {
         return;
     }
     var currVolume = core.musicStatus.volume;
+    time /= Math.max(core.status.replay.speed, 1);
     var per_time = 10, step = 0, steps = parseInt(time / per_time);
     var fade = setInterval(function () {
         step++;
@@ -2037,6 +2039,7 @@ events.prototype.vibrate = function (time, callback) {
     }
     if (!time || time < 1000) time = 1000;
     // --- 将time调整为500的倍数（上整），不然会出错
+    time /= Math.max(core.status.replay.speed, 1)
     time = Math.ceil(time / 500) * 500;
     var shakeInfo = {duration: time * 3 / 50, speed: 5, power: 5, direction: 1, shake: 0};
     var animate = setInterval(function () {
diff --git a/libs/items.js b/libs/items.js
index 6c13e824..15ce13ac 100644
--- a/libs/items.js
+++ b/libs/items.js
@@ -35,7 +35,7 @@ items.prototype._resetItems = function () {
     if (core.flags.bombFourDirections)
         core.material.items.bomb.text = "可以炸掉勇士四周的怪物";
     if (core.flags.snowFourDirections)
-        core.material.items.bomb.text = "可以将四周的熔岩变成平地";
+        core.material.items.snow.text = "可以将四周的熔岩变成平地";
     if (core.flags.equipment) {
         core.material.items.sword1.cls = 'equips';
         core.material.items.sword2.cls = 'equips';
diff --git a/libs/maps.js b/libs/maps.js
index 2e8c4c8f..b8aaf3a9 100644
--- a/libs/maps.js
+++ b/libs/maps.js
@@ -238,7 +238,8 @@ maps.prototype.saveMap = function (floorId) {
     if (!floorId) {
         var map = {};
         for (var id in maps) {
-            map[id] = this.saveMap(id);
+            var obj = this.saveMap(id);
+            if (Object.keys(obj).length > 0) map[id] = obj;
         }
         return map;
     }
@@ -1688,6 +1689,7 @@ maps.prototype.jumpBlock = function (sx, sy, ex, ey, time, keep, callback) {
 maps.prototype.__generateJumpInfo = function (sx, sy, ex, ey, time) {
     var dx = ex - sx, dy = ey - sy, distance = Math.round(Math.sqrt(dx * dx + dy * dy));
     var jump_peak = 6 + distance, jump_count = jump_peak * 2;
+    time /= Math.max(core.status.replay.speed, 1)
     return {
         x: sx, y: sy, ex: ex, ey: ey, px: 32 * sx, py: 32 * sy, opacity: 1,
         jump_peak: jump_peak, jump_count: jump_count,
@@ -1751,6 +1753,7 @@ maps.prototype.animateBlock = function (loc, type, time, callback) {
         return;
     }
     this._animateBlock_drawList(list, isHide ? 1 : 0);
+    time /= Math.max(core.status.replay.speed, 1)
     this._animateBlock_doAnimate(loc, list, isHide, 10 / time, callback);
 }
 
diff --git a/libs/ui.js b/libs/ui.js
index 9ec62374..67e5ad85 100644
--- a/libs/ui.js
+++ b/libs/ui.js
@@ -971,6 +971,7 @@ ui.prototype.drawScrollText = function (content, time, lineHeight, callback) {
 
 ui.prototype._drawScrollText_animate = function (ctx, time, callback) {
     // 开始绘制到UI上
+    time /= Math.max(core.status.replay.speed, 1)
     var per_pixel = 1, height = ctx.canvas.height, per_time = time * per_pixel / (this.PIXEL+height);
     var currH = this.PIXEL;
     core.drawImage('ui', ctx.canvas, 0, currH);