Source: https://www.patreon.com/posts/56724847

We spoke about the relation between restrictions and creativity already above. And compared to nowadays game consoles the NES was extremely restricted. The more fun it is to develop software for that neat box full of plastic and silicon.

A developer going by the name Kasumi does so, and attempts to implement at least a few levels of Spelunky 2. The original game was released in 2009 and can not be called 'retro', but implementing the successor on the NES is at least an activity that sounds like a serious retro challenge.

In his post Kasumi speaks about all the details of the implementation. And even though it is hard to decide, whether this back-port from the Nintendo Switch to the NES can be considered a down- or an upgrade, there are a number of serious downscaling challenges, that came up during the development.

Quite an interesting read. Whether you develop retro games or not, there is plenty to learn.