Megaman Chronicles: The Capture is a fun old-school jump n' shoot game where you are tasked with rescuing Dr. Light from the treacherous Dr. Wily.
It features some graphics that will bring you way back, but this platformer is full of boss battles, secrets, and some awesome weapons to help you along. You can start off as one of four different players; Goldman, Chaosman, Pyroman, and Lightman each of which starts you in a different game scenario.
There is a help page where you are provided with helpful gameplay tips while you practice. Press F1 to bring up the controls, and F4 to resize the game window.
Megaman Chronicles: The Capture has three levels of difficulty to choose from Normal, Hard, and Insane. A fun little game to play that will bring up some nostalgic arcade hall memories not to mention burning the keyboard soundtrack into your brain.