Use this instead since https://tetre.ml has gone: https://leduyquang753.github.io/tetreml

when i open BXT after opening HL (WON), nothing happens but when i type "map c1a0" in console, game crashes. (i use NGHL by the way.)

I have the same problem, and i'm changing (the) fps to 20 but nothing happen, still stuck. Help. Edit: I use NGHL btw.