It's a remake of Super Mario Land!
Made using the same engine
Perennial uses. It runs a lot better than the gameboy version, and has some neat features:
- 4-Player Couch Co-Op
- Parallax backgrounds
- Joystick support
- Wide screen support
- High refresh rate support
The graphics have been improved
slightly. The goal was to recreate the game how you remember it, not how it was or how it would have been on a more modern system.
There is also an option to make it look like the original gameboy graphics, complete with greenish tinge and pixel grid.
The browser version uses javascript and WebGL. I have tested it in firefox and chrome. I recommend using chrome, especially if you have a high refresh rate monitor.