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2023-09-15 00:35 dustin  
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in the previous cave, Κ has learned to deal with one-directional growing ΜΜΜ, now he faces their big brother who is far more powerful and can quickly fill the whole cave!  
  
ideas behind this cave:  
| introduce bidirectional growing walls in two typical scenarios:  
\ one-way maze  
| pursuit from behind  
  
remark: bidirectional growing walls were not supported by the early bd engines, which is why they don't occur in any early fangames. although they are a logical extension of horizontal ΜΜΜ, they were only introduced in later fanmade bd engines!  
  
i do count bidirectional growing walls at least as "semi-classical", so i used and use them regularly in my  dustin 's bd series!