Projects | Arttu Nikkilä

Chapter 1

Work Lab

Chrome DevTools Extension for checking Shopify analytics and consent setups.

Screenshot of the Sentinel Chrome extension overlay showing consent and dataLayer details

Fun Fact Sentinel turned my usual hour of pixel-checking into something I could do in a few minutes.

Sentinel displays core Shopify store details, shows all dataLayer pushes including those from custom pixels, tracks consent states from the Shopify Customer Privacy API and common cookie banners and allows changing the consent. It also reports the default consent status and verifies that consent mode is wired correctly.

I built it because nothing in the Chrome Web Store covered this workflow, and checking custom pixel dataLayer events for custom GTM setups on Shopify takes way too long without a tool like this. Being able to check custom pixel dataLayer pushes is crucial to ensure that analytics setups work correctly with Shopify stores.

Tech stack

JavaScript Chrome API HTML CSS

Reduces time spent validating and debugging custom pixels and GTM setups.
Makes consent and dataLayer checks predictable across storefront builds.

Chapter 2

Personal Tools

Juoksuloki

Niche CLI that turns Suunto iOS workout exports into a clean Excel log.

Fun Fact Taught me a lot of Excel chart magic in the process.

Juoksuloki is a small Python Command Line Tool for pulling Suunto Run exports into a local Excel file.

Drop the JSON files into your Mac’s Downloads folder with Airdrop, run the command, and the script moves them into a tidy directory, parses key metrics, and updates a long-term log (juoksuloki.xlsx) sorted by date.

Made for iPhone + macOS users who want their run history stored locally without relying on any cloud service. Allows user to examine the running data with computer.

Tech stack

Python Pandas CLI

Makes weekly run reviews quick instead of a manual copy-paste job.
Keeps years of Suunto data in a single local Excel file without vendor lock-in.

Chapter 3

Playable Worlds

Kandi Rush Saga

A chaotic 2D shooter where you collect study credits and dodge academic doom.

Fun Fact Made because I thought the name was so good it deserves a game built around it.

Kandi Rush Saga started as a joke and turned into a small browser game built with JavaScript, Canvas and Phaser.

You play as a Finnish student trying to rack up 180 credits before running out of allowance months. Credits are earned by shooting them, hazards chip away your months, and a plagiointisyytös ends the run on contact unless you slip past it on the pink safe zone. Beware of Moodlen käyttökatko. Beer grants an extra month, of course. If you win, you hear me singing Gaudeamus igitur!

Tech stack

JavaScript Phaser Game

Turned a student-life reality into a working arcade game.
Used as a learning project to get comfortable with Phaser.

Gradu Theft Auto

Top-down thesis grind through Kauppakatu with distractions and deadlines.

Fun Fact The walk and encounters are loosely based on reality.

Gradu Theft Auto is a sequel to Kandi Rush Saga: it's a browser game about trying to wrap up a master's thesis before your study grants end.

Each in-game day you walk up Kauppakatu toward the library, dodging calls, fundraisers and friend-induced detours

while trying to reach 100 % progress before the 21-month allowance clock hits zero.

Built with Phaser, simple bitmap assets and a lightweight street loop that keeps the focus on timing and choices.

Tech stack

JavaScript Phaser Game

Ended up being used by friends as a silly speedrun challenge.
Taught me the value of limiting scope early so the project actually ships.