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Some thoughts on touch screen user interface design

Creating intuitive natural interfaces

June 24, 2020
I am working on a new app involving personal health that requires a natural intuitive interface that works well on touch screens. It's good to check out some best practices for touch UI design

Past weeks I have been working on a new app involving personal health. The main challenge is to come up with an intuitive, natural interface that works well on small touch screen devices. But what is it that makes an touch screen interface any good? Read along for some best practices.

Different ways to visualise health

Looking at games and fitness apps

May 25, 2020
To better understand how to visualise health I looked at different health/fitness apps and games.

This month I did some research into how health is visualised in fitness apps and games. For a new app involving personal health I am looking for an intuitive way to visualise how healthy one person is. There are many colourful approaches out there!

Realtime human pose recognition through computer vision

Using TensorFlow and PoseNet on a video feed

Dec. 1, 2019
For an exciting new project I have been experimenting with TensorFlow, enabling realtime pose detection using PoseNet.

For an exciting new project I have been experimenting with computer vision using TensorFlow. I wanted to achieve realtime human pose detection to drive interactive video projections and games. Time to dive into the world of machine learning, tensors and computer vision!

Updating Snake '97

About the challenges of developing a wildly popular game

Feb. 21, 2018
This month I bit the bullet big time: I redesigned the game engine of the wildly popular Snake '97 game. Read about the design challenges in this blog post.

Few years ago my brother threw a beer on my iPhone in an Amsterdam bar. The poor thing didn't like the Dutch brew as much as I do: it died. While waiting for a new phone to arrive, I used an old one that couldn't do anything but texting, calling and... Snake! The idea for Snake '97 was born and this month it was time to update the wildly popular game.

Repairing a Nintendo Gameboy Advance SP

Chip surgery to play classic Zelda

Mar. 26, 2017
Reparing an old Nintendo Gameboy Advance to play classic Zelda again.

This month Nintendo released the Switch with Zelda "Breath of the Wild". The new console received positive reviews. The new Zelda game is amazing and can be played on-the-go, thanks to the portability of the Nintendo Switch. But it its hardly the first Nintendo device that features the mythical kingdom of Hyrule with Link and princess Zelda. I found an old Gameboy Advance, perfect for playing classic Zelda games... but it was in need for repair!

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Whoop showing strain and recovery
Whoop showing strain and recovery
The actual code from Snake '97 handling distance calculation using the Pythagoras Theorem
The actual code from Snake '97 handling distance calculation using the Pythagoras Theorem
This old Gameboy was broken: it stops working if you
This old Gameboy was broken: it stops working if you "squeeze" it... an indication of some electrical failure.
Snake '97 running on iPhone X - looking and feeling like the retro mobile phone game from the 90s
Snake '97 running on iPhone X - looking and feeling like the retro mobile phone game from the 90s
iPhone 4 - ahhh sweet developer memories when one (small) size did fit all...
iPhone 4 - ahhh sweet developer memories when one (small) size did fit all...
Snake '97 available as free download for iOS, Android, macOS, Windows and ChromeOS
Snake '97 available as free download for iOS, Android, macOS, Windows and ChromeOS
Snake '97 - It's fun, but it's UI design is arguably bad
Snake '97 - It's fun, but it's UI design is arguably bad
Navigation structures that rely on hovering are NOT going to work on touch screens
Navigation structures that rely on hovering are NOT going to work on touch screens
The Back / Hide / Save buttons are near the thumb: they are within range and reaching for them does not cover the contents of the screen
The Back / Hide / Save buttons are near the thumb: they are within range and reaching for them does not cover the contents of the screen
Analysing gameplay speed differences using slow motion video
Analysing gameplay speed differences using slow motion video
ReCaptcha: you've been training Google's AI for years!
ReCaptcha: you've been training Google's AI for years!
Controlling Snake using a Super Nintendo gamepad is awesome (using a SuperSmart-joy USB connector)
Controlling Snake using a Super Nintendo gamepad is awesome (using a SuperSmart-joy USB connector)
The new Zelda game
The new Zelda game "Breath of the Wild" sets the new benchmark for open world games according to the popular blog The Verge. It looks amazing!
On the left: an original screenshot from
On the left: an original screenshot from "Link's Awakening" (1993). On to the right: how fans perceive the magic. (Fan art created by "einen" from http://einen.deviantart.com)
World champion of Snake '97 - but not for long...
World champion of Snake '97 - but not for long...
UX-design for an international audience. Designing interfaces without words is difficult!
UX-design for an international audience. Designing interfaces without words is difficult!
PomPom faux puff mirror by Daniel Rozin
PomPom faux puff mirror by Daniel Rozin
Same 3310? Look closely and spot the differences between iPhone SE and iPhone X
Same 3310? Look closely and spot the differences between iPhone SE and iPhone X

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