Update app.py

app.py

@@ -66,7 +66,7 @@ def generate(pipes, enemies, blocks, elevation, temperature = 2.0, level_size =
     </div>'''
     return [img, gradio_html]
 
-with gr.Blocks() as demo:
+with gr.Blocks().queue() as demo:
     gr.Markdown('''### Playable demo for MarioGPT: Open-Ended Text2Level Generation through Large Language Models
     [[Github](https://github.com/shyamsn97/mario-gpt)], [[Paper](https://arxiv.org/abs/2302.05981)]
     ''')