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Roto Game is a puzzle game inspired by 70s bathroom tiles.

Play at: (see also related Chrome Experiment)

There is a variant of Roto Game with squared tiles, ROTOGAMEsq. Source code is available on GitHub.


Getting started

  • To enable debug mode, edit /

    debug = True

    Debug mode should be disabled before deploying the application.

  • For initializing the database, browse the following URL path, relative to the root URL of the project. This functionality is only available in debug mode. Beware: This may delete existing data, e.g. entries in the top players lists.



  • Coordinates in piece space are measured in piece positions on the board. The left most piece position is 0, the second left mose is 1, etc..

  • Coordinates and dimensions in piece space are usually postfixed by the letter p (upper or lower case).


  • Follow the instructions below to create a so called custom Dojo build, located in:


    One reason for using a custom build is that there is a bug which affects FF3, which Felix experienced in 2009 when connected via T-Mobile Germany UMTS.

    In a nutshell, it seems that Dojo requires to be evaluated before some initialization is finished. For example, Felix saw FF3 requesting the following invalid resource:

    How to create the build, which is usually only necessary after an update of Dojo:

    1. Run the following command in the dojo "buildscripts" directory:

      build.bat profile=rotogame action=clean,release optimize=shrinksafe

      Location of that directory ($version is the Dojo version number):


      The resulting build is located in:

    2. Update the files in, using the newly built versions:

  • Tasks recommended before deployment:

    • Validate HTML.

    • Test with popular browsers: Firefox, Chrome, Opera, Safari, IE6, IE7, IE8

    • Test with images turned off in Firefox.

    • Test with JavaScript turned off in Firefox.

    • Test via a mobile connection (with image compression) with IE8 and Firefox.


GIF images exported from XARA should have transparency set. Otherwise, when viewed via a T-Mobile Germany UMTS connection with image compression, some unwanted color may turn transparent (as of June 2009).


Copyright 2009–2015 Felix E. Klee

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.


Roto Game is a puzzle game inspired by 70s bathroom tiles.




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