I don't think that you know what you are talking about:
The first thing is that is not just drawing. You can't draw in a piece of paper it has to be done in the computer and than use a program like Flash to make walking animation,hitting,jumping,swimming. Is pretty much time consuming and the person doing needs to know some knowledge about rigging and coding.
It takes more than a month to make a good game and apple/android store won't accept just any simple game made by somebody since it could harm a person's device.
You will need people to help you because coding isn't simple
Also it looks like you are asking for art similar to Minecraft and this will cause a lawsuit from Mojang.