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It took me about 20 hours (including assets). Most of the code is done from scratch - I have used (my) CanvasQuery library for color operations and 2d context wrapping
Thanks to Agness R., Paul W. and Vennril for support and quality assurance.
Thanks to SOS for his nerdy screencast which kept me awake and motivated.
Greetings are going to photonstorm and #bbg community
Holding thumbs for everone to finish their games - especially you Hoppertje.