I have one, it's been bugging me for years, the problem is my memory of it is incredibly vague and possibly some of it is dreamt up :/
What I remember:
A sidescroller, where you are in some sort of caves/tunnels. I very distinctly remember it being puzzle-like, you had to find objects like a levitation device and also some sort of key for a bridge... You go to the left or right end of the screen and it takes you to another part of the cave/tunnel etc any enemies are a blur, but what stands out (and this may be the part I dreamt) the image of a 'castle' with some kind of fire and guarded by I think Anubis-like creatures. I don't think it was a castlevania game as some have suggested.
Other than that, sorry I can't be more specific
What I remember:
A sidescroller, where you are in some sort of caves/tunnels. I very distinctly remember it being puzzle-like, you had to find objects like a levitation device and also some sort of key for a bridge... You go to the left or right end of the screen and it takes you to another part of the cave/tunnel etc any enemies are a blur, but what stands out (and this may be the part I dreamt) the image of a 'castle' with some kind of fire and guarded by I think Anubis-like creatures. I don't think it was a castlevania game as some have suggested.
Other than that, sorry I can't be more specific