No doubt just a test name at this stage, Mario Clone is a very early proof of concept of a platform game – with a cute hi-res overlaid character.
You can move around, climb ladders, but not collect any items at this stage. Again, it seems to be a project abandoned very early on before it could really get started.
Oddly it features the title screen music from Slap Fight as you play.
So what were the plans for this title and why was it cancelled so early on? If you know more, then please do get in touch.