The emulator used on this site is emulatorjs
Find more info at emulatorjs.org
Saving games
the emulator does not automatically save/load progress, even in games with saving features
so you have to do it yourself
To make a save state, first hover over the bottom to open the menu. then press the save icon. This will save your exact game state to your computer.
This will look like "GAMENAME.state"
when you want to restore your state, press the folder icon. Then, in the window that appears, select your .state file. It will continue your game exactly where you last saved it.