$ whoami
↪ rzkowski

Richard Ziolkowski ships iOS apps, Linux games, & operator tools.

Shipped apps, playable systems, public courses, and prototypes built to be used, not just shown.

pwd
~/rzkowski.com
site
rzkowski.com
show
9 featured · 22 projects · 61 prototypes
cmd
press / to filter the showcase
projects

$ ls ./projects

22 things shipping, playable, or worth showing.

A practical index of the work: live web systems, App Store apps, iOS games, Linux learning tools, and selected prototypes.

$ ls ./featured

Featured work

Shipped apps, playable products, launch-track games, and live web systems.

9 entries
Web · AI course Live

AI Atlas

A free course site for working engineers who want AI concepts explained in practical terms.

A public AI curriculum that is free to read, easy to share, and built without a signup wall.

  • React 19
  • TypeScript
  • Vite 7
  • Tailwind
  • Vitest
Private source live · ai-atlas.uk
Web · narrative game Playable campaign

Terminal Tribe

A story-driven Linux shell game where the terminal is how you survive.

A browser Linux game where the terminal is the main verb, not a decorative skin.

  • React 19
  • Vite
  • TypeScript
  • Zustand
  • Tailwind v4
Private source live · terminaltribe.com
Web · data course Free launch

NiFi Factory

Free Apache NiFi course for working data engineers, built around production flow patterns.

A free NiFi course for people who need to understand real flows, not just memorize processor names.

  • React 19
  • Vite
  • TypeScript
  • React Router
  • Tailwind CSS
Private source live · nififactory.com
iOS · drill v1.0 live · 5.0 candidate

Terminal Drill

iOS shell practice app for building command recall through short daily sessions.

A shell-practice app for actually remembering commands, not just recognising them in a multiple-choice list.

  • SwiftUI
  • WidgetKit
  • ActivityKit
  • StoreKit
  • iOS 17+
Private source live · terminaldrill.com
iOS · learning v3 stabilization

Shell Atlas

iOS app that teaches the Linux terminal as territory on a star map.

A terminal-learning app that makes command practice feel like exploring a place, not grinding a list.

  • SwiftUI
  • SwiftData
  • StoreKit 2
  • WidgetKit
  • MetricKit
Private source
iOS · strategy game Beta polish

Small Suns

Turn-based iPhone 4X strategy distilled into short seeded runs, faction choices, and tactile empire-building.

A small 4X strategy game that tries to keep the pleasure of expansion without bringing the spreadsheet with it.

  • SwiftUI
  • XcodeGen
  • SwiftData-ready state
  • Seeded runs
  • Rule coaching
Private source
iOS · lifestyle App Store · v1.3

Us Again

A private couples card game that gets better the more you use it — time-aware prompts, notes, reminders, and local export.

A private couples card game built to feel useful after more than one night.

  • SwiftUI
  • StoreKit 2
  • AVSpeechSynthesizer
  • UserNotifications
  • PDF export
Private source
Web · publication Public beta

KernelBrief

Source-backed Linux, FOSS, and HomeOps intelligence for people who need signal without hype.

A Linux and HomeOps publication for people who want source-backed signal without the noise.

  • Static rendering
  • Cloudflare Pages
  • Workers
  • D1
  • RSS
Private source live · kernelbrief.com
iOS · narrative game Launch candidate

The Long Retreat

An iPhone survival game about leading a convoy home and remembering who did not make it.

A survival game where the record of the run matters as much as the route home.

  • SwiftUI
  • SwiftData
  • WidgetKit
  • Live Activities
  • iOS 17+
Private source

$ ls ./active

Active builds

Current products and prototypes with enough working surface to show.

8 entries
AI · multi-agent In development

LLM Trader

A local AI trading lab where models can suggest trades, but rules decide what is allowed.

A trading console for exploring AI judgment while keeping execution under boring, explicit rules.

  • Python
  • Docker
  • FastAPI
  • Solana
  • Jupiter Swap v2
Private source
Web · drill trainer Shipped

Linux Learning Game

A no-install browser trainer for practising Linux commands and operations.

A lightweight Linux practice site that can live in one browser tab and still feel useful.

  • TypeScript
  • Vite
  • Vanilla ES modules
  • localStorage
  • Vitest
Private source
Web · admin simulator Shipped

Jira Admin Simulator

A Jira admin trainer for practising where to look, what to inspect, and what to change.

A browser trainer for practising Jira admin judgment before doing it in a real instance.

  • React 18
  • Vite
  • JavaScript
  • Tailwind CSS
  • Framer Motion
Private source live · jira-sim.pages.dev
iOS · arcade Month 5 polish

Swipe

iOS arcade space combat where the song you pick changes the shape of the run.

A rhythm-shaped arcade prototype where picking a song also picks a style of pressure.

  • SwiftUI
  • RealityKit
  • Game Center
  • iCloud KVS
  • iOS 18+
Private source
iOS · narrative game Launch candidate

The Last Bookstore

A SwiftUI shop-management narrative game about matching dangerous books to fragile customer needs.

A quiet shop game where the hard part is deciding what a person should leave with.

  • SwiftUI
  • SwiftData-ready persistence
  • XcodeGen
  • JSON content packs
  • Unit/UI tests
Private source
iOS · mystery game Day 1 slice

The Eighth Witness

Premium iPhone mystery game about reading motives, omissions, and contradictions inside an alien diplomatic enclave.

A focused mystery slice about reading people, evidence, and omissions before committing to a theory.

  • SwiftUI
  • Local content
  • Case schema
  • State models
  • Case checks
Private source
iOS · arcade game App Store prep

Jetpack Junker

iOS arcade game about scrapping derelict ships, surviving hazards, and upgrading for one more run.

A faster, fuller version of the arcade prototype, now close enough to show as a real game in progress.

  • SwiftUI
  • SpriteKit-style assets
  • Game Center
  • CloudKit
  • Core Haptics
Private source live · support
iOS/macOS · strategy game Work in progress

Voidline: Last Convoy

Tactical starship roguelite about holding together the last civilian convoy through a collapsing route.

A playable direction for a tense command game: keep the ship moving, keep people alive, and decide what can wait.

  • SwiftUI
  • SpriteKit
  • Swift Package
  • XcodeGen
  • Deterministic simulation
Private source

$ ls ./mods-and-ports

Mods & ports

Fun side builds, emulator ports, and work-in-progress projects kept distinct from product launches.

3 entries
Modding · Stardew Valley v0.17.0 package

Just Richard

A Stardew Valley Content Patcher mod made as a bit of fun and a surprise for my wife.

A polished little side project: personal, playful, and intentionally not something to read too deeply.

  • Content Patcher
  • SMAPI
  • Stardew Valley
  • Pixel art
  • TMX maps
Private mod source
Desktop · emulator In progress

mxdream

A macOS-first Dreamcast emulator project, rebuilding an older emulator into a modern Mac app.

A Mac-native emulator project that is interesting for the rebuild itself, not because it is being presented as a finished emulator.

  • SwiftUI
  • AppKit
  • Metal
  • MetalFX
  • SwiftData
Private fork/source
Desktop · emulator port In progress

Xemia

My macOS Apple Silicon porting work for Xenia, with the native Mac pieces coming together.

A serious Mac porting project, still very much in progress, but far enough along to show the direction.

  • C++
  • ARM64 JIT
  • Metal
  • CoreAudio
  • GameController
Private fork/source

$ ls ./archive

Earlier slices

Smaller vertical slices and adjacent ideas kept for context.

2 entries
macOS · game Vertical slice

DeadShell

Typing combat for macOS, inspired by Typing of the Dead.

An ASCII-only archive note for a small typing-combat slice until it has proper gameplay media.

  • SwiftUI
  • SpriteKit
  • SwiftData
  • macOS 15+
  • Apple Silicon
Private source
iOS · game iOS slice

Dead Shell iOS

Mobile sister to DeadShell. Drag-trace shell command chains under threat.

An ASCII-only archive note for a touch-first command-chain experiment until the right media exists.

  • SwiftUI
  • SpriteKit
  • SwiftData
  • Core Haptics
  • iOS 17+
Private source

$ ls ./prototypes

Prototype archive →

61 sketches, app ideas, narrative game seeds, and long-running labs.

$ cat ./technical-notes

Technical notes →

Supporting notes on local LLMs, coding agents, evals, and runtime boundaries.

$ cat ./about.md

Richard Ziolkowski

I make iPhone apps, web tools, games, courses, and small developer utilities. Most of the projects here started as something I wanted to use, teach, or play myself.

I usually work in Swift and SwiftUI, React and TypeScript, Python, and Docker. I like simple interfaces, fast feedback, and code I can come back to later without relearning the whole thing.