They removed the playtest, and in demo version you can't freely pick up a character and just go at it, instead there is progression now. Just got into this a day ago rip.

Replace keydef to this in config file 57 53 41 44 00 10 00 64 00 00 26 25 11 46 00 00 00 00 00 00 00 00 00 00 00 57 28 41 27 0D 20 1B

WASD to move arrow up to aim arrow left to shoot SHIFT to run F to status 4 to map CTRL to configure

I didnt test it too much but it seemed to work as it should, but let me know if there is something wrong with it.