When I said the main screen is different from the game I meant the art style and atmosphere. When I open the start menu I'm expecting a Sci-Fi space fighting game or something like that, and the game is very different from my expectations. It's like if you write a book crime novel book and put a colorful cartoon character on the cover.
Firstly you should fix the camera and the other minor issues. Where you choose to go after that is up to you. You could have it so that if you save a red furbie you get a red furbie skin which has slightly different mechanics. Maybe with the red one you can jump higher or fall down slower or something. It's all up to you! :) Good luck