Yea, it"s quite a huge scope :)
I'm working alone on it, but only do the game design & gameplay programming.
Visuals, sounds, animations are from third parties :)
Back to your game, I think it could also do well on mobile platform. You should have a look.
I saw you're developping on UnrealEngine4, I tried once to build a small platform game on Android, and it turned to be quite easy.