
Alexander is a writer, traveler, and serial digital entrepreneur. He’s the founder of the Tushi, the Gen X personal growth newsletter Further, and offers small business advice at Unemployable.

Twitter

Linkedin

Facebook

Director and Chief Evangelist

Alexander Hipp


Anil is a content-obsessed marketer who loves driving organic traffic for outstanding companies. He is also the creator of Hack the Content, co-host of The Runner, and owner of several digital commerce sites.

Managing Partner

Anil Vugels


Monika is a writer, musician, and content strategist with a passion for language. When she isn’t helping clients, you can find her writing songs, hiking in a northern forest, or furiously journaling.

Director of Operations

Ann Monika

Programmer / Founder / Student

Tim Schupp


Retro Escape is a simple but challenging puzzle game. Guide a character from the start to the end tile while navigating walls, collecting items in the right order, and using them appropriately to solve each level.

However, that's not all — programmable blocks and recursive objects unlock new puzzle concepts and level designs.

Not only can you challenge your mind by solving tricky levels, you can also use your creativity to build unique ones. The built-in level editor includes all game blocks and offers a simple script language to interface with the programmable blocks. Created levels can be saved or shared via file and QR code.

The game was developed cross-platform using the LibGDX framework. It was written in Kotlin and uses the ZXING library for QR code detection. An Android beta was released featuring 30 levels.

### Gallery

![Retro Escape banner](/assets/archive/banner_rtesc_3.png)

![Retro Escape banner](/assets/archive/banner_rtesc_4.png)

![Retro Escape banner](/assets/archive/banner_rtesc_5.png)

![Retro Escape banner](/assets/archive/banner_rtesc_6.png)

![Gameplay](/assets/archive/retro_escape_play.gif)




A simple yet challenging puzzle game with programmable blocks, a level editor, and QR-based sharing. Built with Kotlin/LibGDX and ZXing.

Retro Escape


Frequency Quick Response (FQR) Codes enable sending small to medium-sized files by converting data into a sequence of QR codes.

This sequence is displayed by an app on the sender's device and captured by the receiver's camera — no network connection required.

Because transfer happens via QR codes, an FQR sequence can also be printed, passed on paper, and re-scanned later. For example, small flipbooks can be used as physical data carriers and distributed as a novel brochure format.

One major advantage of FQR is that it does not require a connection like Wi‑Fi, Bluetooth, or cellular, which might incur costs or be unavailable. In areas without mobile coverage — or when large files would deplete data plans — FQR can be a faster and more practical alternative on smartphones.

Like traditional QR codes on paper, FQR codes can be shown on screens — in broadcasts or shop windows — to transfer additional materials directly to users' devices.

### Further reading

- [Ausarbeitung (PDF)](/assets/archive/FQRAusarbeitung.pdf)
- Jugend forscht: Frequency Quick Response Code: https://www.jugend-forscht.de/projektdatenbank/frequency-quick-response-code.html
- Weser Kurier: Erfolgreiche Forscher: https://www.weser-kurier.de/region/die-norddeutsche_artikel,-erfolgreiche-forscher-_arid,1587114.html
- „Jugend forscht“: Ideen aus dem Klassenzimmer: https://www.kreiszeitung.de/lokales/bremen/ideen-klassenzimmer-8008471.html

![FQR infographic](/assets/archive/fqr_info_graphic.png)




Offline file transfer by streaming sequences of QR codes — printable, scannable, and network-free.

Latest Posts

Retro Escape

Frequency Quick Response (FQR) Code