Blocks is a geolocation based capture the flag game. You compeate against others on teams to get the most points, win games, and climb up the leaderboard.

Live: Play Github: Source Code

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I took the class SE319, Construction of User Interfaces at Iowa State which has a project based component. My friend and I worked on a team to design, build, and release an app. I learned a lot about the application building process from Research, Design, Development and how all steps come together to deploy a finished product.


1. Gameplay

Capture the flag game with user generated maps and objectives using players geoloation. Teams compeate to capture objectives and gain points.

2. Friends

High score leaderboards to compeate with friends. Search for games to join and play with others as well as in game team chat.

3. User Experience

Mobile optimized game to be usable on both Android and IOS. Thoughtfull UX with animations and and intuitive design.

THE PROJECT: Construction of a User Interface

Design and build an application that with great UI/UX and a robust implementation to fufill goals that you define. —SE319

The development process:
Idea & Scope — Goals, Planning
Research & Proposal - Resources, Tools
Design & UML Diagrams - Flow, Walkthroughs
Development & Implementation - Process, Programing
Release & Feedback - Deployment, Summary

01 - Idea & Scope

Brainstorm ideas and create a realistic roadmap.

After coming up with a few ideas for the application that we wanted to build. We went with rebuilding the project that we attempted to make at HackKU where we barely got started. The premise was location-based capture the flag.

Due to the amount of time that my teammate and I had for this project we decided to:

Build a PWA ( progressive web app ) to save time and reduce amount of code needed.
Move streach goals such as Multiple game modes and AR ( Augmented Reality ) to future tasks.

02 - Research & Proposal

Discover resources and tools for development

When researching tools for the project we found many options but chose to build a React app as we both had previous experience. For mapping we chose Mapbox over Google Maps as it has a better free tier and is very flexible and and easy to work with. Other tools that we used are: Next.JS, Firebase, Redux, ReactSuite, Lottie.


Our app is a cross-platform ( IOS, Android ) mobile game. Using React we can build a PWA for both platforms from one codebase. Our game leverages Location services to create an interactive game that uses interactions with the real world. The game will have user accounts that will be used to store personal information such as friend lists and device location.

The core gameplay will have users on a specified map interact with randomly generated cubes and move them to waypoints, collections, etc. There will be many features of customizability in the game such as maps, players, team numbers, and potentially more objects to interact with. Users will be able to join a game with either a friends list, by searching by username or QR code.

Once in the game, you will be able to chat with your team and see team stats such as how many cubes placed. After brainstorming a few ideas for the application that we wanted to build. We went with rebuilding the project that we attempted to make at HackKU where we barely got started. The premise was location-based capture the flag.

03 - Design & UML Diagrams

Design a compelling user experience with concepts.

Screen interactions outline:
Creating a mental model of the application and how users will go through to get to the game.
Eliminating paint points:
Streamlining onboarding and user flow from load to gameplay.
Scope out all functionality:
Draw out the states of the application to better understand and layout the development process.

Mapping out task flows.

An overview mapping of how the task flows worked transitioning from screen to screen







04 - Development & Implementation


For project management, we used Trello to keep track of tasks and development cycles. All code was saved on Iowa State's Gitlab server and after the class, I uploaded the repository to my GitHub so the code can be publicly visible.


import ReactMapGL from "react-map-gl";

  onViewportChange={(viewport) => this.setState({ viewport })}
  <Source type="geojson" data={this.getValues()}>
    <Layer {...mapAreaLayer} />

react-map-gl is a react wrapper for mapbox-gl that makes it really easy to call functions for game logic and getting users geolocation data and injecting that into the map. This library is the main component for the gameplay.

State Management

import { createStore, applyMiddleware } from 'redux'
import { DashboardState } from './constants';

const initialState = {
    // state variables
    dashboardState: DashboardState.home,

const setGlobalLeaderboardList = (state, action) => ({
    // redux function to update state
    globalLeaderboardList: action.users

const reducer = (state = { initialState, input: {} }, action) => {
    switch (action.type) {
        // update global state
        case 'dashboardHome':
            return {
                dashboardState: DashboardState.home

const composeEnhancers = composeWithDevTools({trace: true})
export const initializeStore = (preloadedState = initialState) => {
    return createStore(

Redux is incredibly powerful and great for managing state in larger applications. Redux is used to manage signed-in users, screen state, gameplay stats, etc. Above is a sample Store.js file detailing how states are saved using Redux.

05 - Release & Feedback


For hosting and deployment we are using Vercel. Vercel is great for setting up an easy continuous deployment pipeline. When the master branch is updated in version controll it triggers a deployment and updates in a few minutes.


I learned a lot about application development during this project. Going from an idea to a fully deployed project in a short period of time is great for learning how to do tasks quickly and efficiently for an agile development process. Integrating tools and frameworks into a project and handling dependencies for complex applications can be very difficult but finding solutions or alternatives is very rewarding. Overall it was a great project, I learned a lot, and the project is a functioning tech demo that is live.