It depends on how original you want it to be. Innovation builds on ideas from the past (the past in term tries to limit the future and innnovation with tighter and tighter copyright laws, but that's another story.)
There could be plenty of original games if you don't say it's unoriginal because you've seen another game from the same perspective.
What would have to be different is the gameplay, the laws of the game, and then the levels. If I could do 3D graphics I would already be working on something a bit crossover between Marble madness and Bob's bad day.