Identifying a Classic Game: Purple Slime, Monster Drops, and Collecting Currency

That sounds like a classic game called "The Legend of Zelda: A Link to the Past"!

Here's why it fits your description:

• Running around with a guy: You play as Link, a young hero.
• Dropping purple slime: Link uses a magical item called the "Magic Rod" which shoots purple "magic" at enemies.
• Collecting objects like money: You collect Rupees, the game's currency, and other items like hearts to heal Link.

It's a very popular game from the Super Nintendo era, so it's likely you played it when you were younger. If you're looking to reminisce, it's definitely worth revisiting!