Hi wesley, thanks for your answer, hmmm actually that's not a problem for me, I already know Unreal a bit. And I think I will end up using it eventually, because I also have future plans to make a 3D game and I probably will not acquire such visuals with Unity as with Unreal. So, it will be a good thing to me to make a simplier game with it first. :)
Edit: Hmmm, I see there is quiet huge lack of 2D platformers tutorials for UE4, so maybe will go with Unity.