The demo is complete and uploaded. It's 10 levels and showcases all the features I made for the game.
I will be releasing my Unity3D project with all my assets and source code as well, including a brief guide to making your own levels using the tools I created in the project. No coding is required to make new levels and even integrating them into the main game.
Since everything is open source, there's nothing stopping others from building on the game and further improving the tools and adding new features if anyone's interested.
I'm happy to finally be done with this and share my creation with others. I welcome all comments, criticisms and question.