It seems you're looking for a guide to download for PC. However, I should first clarify a few important points before providing instructions.

Search for reputable retro gaming or Yu-Gi-Oh! fan forums (like Yu-Gi-Oh! Kirk).

He didn't play a monster. He didn't activate a trap. Instead, Kael dragged the white card not onto the field, but onto the icon in the corner of the window.

Since this is a fan-modified version of the 2003 release, you won't find it on Steam or official storefronts. You must look for community-hosted "All-in-One" versions.

Check the game settings to run in a window for better clarity.