Was really fun. I dont understand how the icon in the mum message should help, but else very nice puzzle. (i also had to take out pen+paper ^^)
btw it does not show any images at all on linux+firefox (chrome worked) The web console said: WARNING: Could not create render target, status: 36054 index.js:467:18 at: _update_render_target_color (drivers/gles3/storage/texture_storage.cpp:2678) index.js:467:18