Pumoxi

This mini project simulates a simple coffee shop game where users can create, update, and manage in-game menu.

The frontend is built with WordPress hosting. The backend leverages AWS API Gateway, Lambda (Python), and DynamoDB.

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How to use it

This mini game comes with 2 features:

• Simulate you own a coffee shop
• Simulate you can maintain the menu of this coffee shop

Game Controls

On top left is a drop down menu, allowing you to simulate a coffee shop business:

Action	Description	HTTP Method	Backend
New Shop	Initialize a new shop	POST	Create a new entry in the coffee shop DynamoDB.
Existing Shop	Resume the last session based on shop ID.	GET	Retrieve the shop details from the DynamoDB.
Delete Shop	Deletes the shop based on shop ID.	DELETE	Delete the shop details from the DynamoDB.
Update Shop	Update the shop info based on the shop ID.	PUT	Update the ship details in the DynamoDB.

Menu Management

On top right is a drop down menu, allowing you to simulate the menu management of the coffee shop:

Action	Description	HTTP Method	Backend
Add new item to menu	Add new food name and price to the menu.	POST	Create a new entry in the menu DynamoDB.
Update existing menu	Update food name and price on the menu based on food ID.	PUT	Update existing entry in the menu DynamoDB.
Delete item from menu	Delete food entry from the menu.	DELETE	Delete food entry from the menu DynamoDB.

Logs and Output

All API responses and simulation logs are shown at the bottom of the interface. This helps track what’s happening under the hood.

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Architecture Diagram

Using AWS API Gateway + Lambda + DynamoDB as a Backend

I treated AWS as a “headless backend”:

• API Gateway exposes REST endpoints.
• Lambda runs isolated Python logic per request.
• DynamoDB persists game state and menu data.
• Python class keep business logic clean and manageable.

This pattern is scalable, cost-effective (server less billing), and decouples frontend logic from backend infrastructure.

State Management Without Sessions

• Instead of relying on WordPress sessions or cookies, I pushed all persistent data to DynamoDB.
• The game state is fetched on each resume or update. This ensures stateless client behavior. It works well with Lambda.

Next Steps

I will include additional features to enhance the Coffee Shop simulation:

• Ordering
• Table
• Cashier

Any feedback or suggestions, please let me know.

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