diff --git a/src/entities/Enemy.js b/src/entities/Enemy.js
index 4e3b91a..7a01c2c 100644
--- a/src/entities/Enemy.js
+++ b/src/entities/Enemy.js
@@ -47,9 +47,15 @@ export class Enemy extends Physics.Arcade.Sprite {
 
     if (this.enemyType === 'bug') {
       this.x += this.speed * dt;
-      if (Math.abs(this.x - this.startX) > this.patrolRange) {
-        this.speed *= -1;
-        this.setFlipX(this.speed < 0);
+      // Reverse only when past the patrol edge AND still heading outward,
+      // otherwise the flip re-triggers each frame and the bug jitters.
+      const dx = this.x - this.startX;
+      if (dx > this.patrolRange && this.speed > 0) {
+        this.speed = -Math.abs(this.speed);
+        this.setFlipX(true);
+      } else if (dx < -this.patrolRange && this.speed < 0) {
+        this.speed = Math.abs(this.speed);
+        this.setFlipX(false);
       }
       if (this.x < -60) this.x = GAME_WIDTH + 60;
       if (this.x > GAME_WIDTH + 60) this.x = -60;
@@ -62,9 +68,14 @@ export class Enemy extends Physics.Arcade.Sprite {
     } else if (this.enemyType === 'mev_bot') {
       const player = this.scene.player;
       if (player && player.active) {
-        const dir = Math.sign(player.x - this.x);
-        this.x += dir * this.homeSpeed * dt;
-        this.setFlipX(dir < 0);
+        // Deadzone: stop chasing when roughly aligned so Math.sign doesn't
+        // flip every frame and make the bot vibrate around the player column.
+        const diff = player.x - this.x;
+        if (Math.abs(diff) > 6) {
+          const dir = Math.sign(diff);
+          this.x += dir * this.homeSpeed * dt;
+          this.setFlipX(dir < 0);
+        }
       }
       this.x = Phaser.Math.Clamp(this.x, 24, GAME_WIDTH - 24);
       const t = time - this.spawnTime;
diff --git a/src/entities/Platform.js b/src/entities/Platform.js
index ee0d7c6..41a8b5d 100644
--- a/src/entities/Platform.js
+++ b/src/entities/Platform.js
@@ -55,10 +55,16 @@ export class Platform extends Physics.Arcade.Sprite {
   preUpdate(time, delta) {
     super.preUpdate(time, delta);
     if (this.platformType === 'moving' && this.body) {
-      this.setVelocityX(this.moveSpeed);
-      if (Math.abs(this.x - this.startX) > this.moveRange) {
-        this.moveSpeed *= -1;
+      // Reverse direction only when past the edge AND still heading outward.
+      // (A plain |x-startX|>range flip re-triggers every frame at the boundary,
+      // which made the platform vibrate in place.)
+      const dx = this.x - this.startX;
+      if (dx > this.moveRange && this.moveSpeed > 0) {
+        this.moveSpeed = -Math.abs(this.moveSpeed);
+      } else if (dx < -this.moveRange && this.moveSpeed < 0) {
+        this.moveSpeed = Math.abs(this.moveSpeed);
       }
+      this.setVelocityX(this.moveSpeed);
       if (this.genesisGlow) this.genesisGlow.setPosition(this.x, this.y + 10);
     }
   }