What a fantastic piece of work!!!
You start off playing it with background music from Elfmania, then you get the music from i think The Lost Vikings is it? and then when you finish a level and go through the exit its got the Chaos Engine voice, then i found i was fighting the giant robot from Turrican 2 with Turrican's graphics and Ruff's sprite!! I haven't gone any further but with all those inclusions so far, I LOVE IT!!..