Think of it as "RPG Maker" for the NES, but significantly more powerful. It allows you to use drag-and-drop assets to build scrolling action games, RPGs, and puzzle games that output actual files.
Go to the official Nesmaker license portal (usually licensing.thenew8bitheroes.com or the link provided in your Itch.io download page). Nesmaker Activation Code
When you run Nesmaker.exe for the first time, you will be met with a dark grey window and a pop-up dialog titled "Activation." Think of it as "RPG Maker" for the