Legitimate archives are usually accompanied by file hashes (MD5, SHA1, SHA256) to verify integrity. H-RJ01279330.rar does not match any known safe hash as of this writing.
To find the "interesting blog post" you are looking for, you can try: H-RJ01279330.rar
: If the game feels too difficult, check the options menu; most Circle H-Works games include a "Easy" or "Beginner" mode that reduces the rate of corruption. Technical Troubleshooting Black Screen on Launch Legitimate archives are usually accompanied by file hashes
For those interested in a more technical deep dive: check the options menu