Thank you guys for the replies!
I'm not sure where and how I want to sell my game but casual gamers would just be frustrated with the game as it is really hard to play and somehow unforgiving to the point as you don't have a lifebar and there are no checkpoints.
Well in that case, yeah, I'd agree with everyone else, go 3.0. The game looked like a simple platformer with some action elements, but if its that challanging, i could definitely see what your saying. I'm quite excited to see it released so I can try it.