Bruh, this isn't Dynablocks from 2004. The screenshots clearly look like Roblox from 2006.
By the way, if you guys want the full client, just find the ROBLOX Client from March 26, 2007 on MaximumADHD's Github page! I can't link it here since I don't know if itch.io will allow other sites.
Client_version for ROBLOX is: 0.3.368.0
Also, if you really want a DynaBlocks.beta Experience, then just get G3D-Fun (aka Blocks3D, ZipBrix)
NOTE: Github mostly doesn't have any malicious files. There sometimes are malicious files if you are in the correct place.