diff --git a/client/app.js b/client/app.js
index 38cd101..951bbb9 100644
--- a/client/app.js
+++ b/client/app.js
@@ -238,6 +238,19 @@ export class App extends decorate(class {}) {
       case 'e':
         this.isMenuOpened = !this.isMenuOpened;
         break;
+      case '1':
+      case '2':
+      case '3':
+      case '4':
+      case '5':
+      case '6':
+      case '7':
+      case '8':
+      case '9':
+      case '0':
+        const slotIndex = (parseInt(key) + 9) % 10;
+        this.setActiveSlotIndex(slotIndex);
+        break;
     }
   }
 
@@ -342,10 +355,10 @@ export class App extends decorate(class {}) {
     }
     const activeSlotIndex = this.selfEntity.activeSlotIndex;
     if (event.deltaY > 0) {
-      this.selfEntity.activeSlotIndex = (activeSlotIndex + 1) % 10;
+      this.setActiveSlotIndex((activeSlotIndex + 1) % 10);
     }
     else if (event.deltaY < 0) {
-      this.selfEntity.activeSlotIndex = (activeSlotIndex + 9) % 10;
+      this.setActiveSlotIndex((activeSlotIndex + 9) % 10);
     }
   }
 
@@ -435,6 +448,12 @@ export class App extends decorate(class {}) {
     ReactDOM.render(DebugUiComponent, this.debugUiNode);
   }
 
+  setActiveSlotIndex(slotIndex) {
+    if (this.selfEntity) {
+      this.selfEntity.activeSlotIndex = slotIndex;
+    }
+  }
+
   startProcessingInput() {
     const config = this.readConfig();
     // Pointer input.