Hi there,
Nice to know your interest on 2D platformer game development
2D platformer is one of the genre that already live long enough but still exist until today video game generation. Even on a console game, 2D platformer type game are one the most popular choose by many user. As I see on the project description, from what you qualified and list, you need a project that designed to be a template project that could be use for reskin, code recycle, and project recycle that usually use for game sequel that have quite similar gameplay with some improvement on the next version of the game, one of the example is Angry Bird Game.
If we analyze angry bird game, from one sequel to another sequel, they got pretty much similar core of gameplay. Designing a project that purposed for this kind of need isn't the same like developing a regular game. Code Efficiency and Code Flexibility needs to be really considered. This means that on future development, we just need to re-use the code that already implemented without tearing down the whole project or script. So just like plug and play + modified. Code documentation like comment it's one of the way to give a better understanding of the code so other developer could re-use the code depends on the way of the project design.
Can you tell me more about the game? Project Design is the key and I'm glad if I could help you finish the project before 3rd Sept. Love to know more if you'd like to chat about it.
Best Regard,
Haidar Abhirama