Change it to mario maker where you can create and upload levels and look at and play others levels directly in the browser and it is still easier to implement i

Change it to mario maker where you can create and upload levels and look at and play others levels directly in the browser and it is still easier to implement in vanilla JS than for example react. Honestly if these things are not enough to constitute a complex web app then I don't see how the demand for people able to write complex web apps can be that large, since almost nothing I use are complex in that case.