If you are looking for a reliable way to play hundreds of NES games, the community generally recommends:
The joy of the 300 in 1 ROM is discovering obscure Japanese games that never left Famicom. Nes Rom 300 In 1
Here is where we have to get serious. The is, by definition, a pirated product. It contains copyrighted code from Nintendo, Konami, Capcom, and Taito. Downloading the ROM file is legally gray at best, black at worst, depending on your country's laws. If you are looking for a reliable way