diff --git a/src/client/Minecraft.cpp b/src/client/Minecraft.cpp
index 1f73ad8..855906d 100755
--- a/src/client/Minecraft.cpp
+++ b/src/client/Minecraft.cpp
@@ -755,7 +755,12 @@ void Minecraft::tickInput() {
 				if (key == Keyboard::KEY_F3) {
 					options.toggle(OPTIONS_RENDER_DEBUG);
 				}
-				
+				if (key == Keyboard::KEY_F4) {
+					player->inventory->add(new ItemInstance(Tile::goldBlock));
+					player->inventory->add(new ItemInstance(Tile::netherReactor));
+					player->inventory->add(new ItemInstance(Tile::stoneBrick));
+
+				}
 				if (key == Keyboard::KEY_F5) {
 					options.toggle(OPTIONS_THIRD_PERSON_VIEW);
 					/*
@@ -909,8 +914,6 @@ void Minecraft::tickInput() {
 		// USPESHNO spizheno
 		static int buildHoldTicks = 0;
 		if (Mouse::isButtonDown(MouseAction::ACTION_RIGHT)) {
-			BuildActionIntention bai(BuildActionIntention::BAI_BUILD | BuildActionIntention::BAI_INTERACT);
-			handleBuildAction(&bai);
 			if (buildHoldTicks >= 5) buildHoldTicks = 0;
 
 			if (++buildHoldTicks == 1) {
@@ -919,6 +922,7 @@ void Minecraft::tickInput() {
 			}
 		} else {
 			buildHoldTicks = 0;
+			gameMode->releaseUsingItem(player);
 		}
 	}
 
diff --git a/src/world/level/tile/entity/NetherReactorTileEntity.cpp b/src/world/level/tile/entity/NetherReactorTileEntity.cpp
index 64c91fb..f55c12d 100755
--- a/src/world/level/tile/entity/NetherReactorTileEntity.cpp
+++ b/src/world/level/tile/entity/NetherReactorTileEntity.cpp
@@ -177,14 +177,14 @@ ItemInstance NetherReactorTileEntity::GetLowOddsSpawnItem() {
 			Item::painting,
 			Item::door_wood
 		};
-		int itemIndex = level->random.nextInt(sizeof(items) / 4);
+		int itemIndex = level->random.nextInt(sizeof(items) / sizeof(Item*));
 		Item* itemToSpawn = items[itemIndex];
 		return ItemInstance(itemToSpawn);
 	} else {
 		static Tile* tiles[] = {
 			Tile::bookshelf
 		};
-		int tileIndex = level->random.nextInt(sizeof(tiles) / 4);
+		int tileIndex = level->random.nextInt(sizeof(tiles) / sizeof(Tile*));
 		Tile* tileToSpawn = tiles[tileIndex];
 		return ItemInstance(tileToSpawn);
 	}