Just a few months back I was porting your version of Rodent's Revenge to Flutter for fun. Maybe I should polish it up a bit and publish it somewhere...

That sounds awesome, please do!

Testing Flutter myself, it's great but I'm not convinced about Dart so far, for instance (de)serializing JSON is a pain.

Hah, I remember playing this game on the primary school computers but didn't know what it was called. Might I suggest adding a section to the readme explaining how to install/compile this?

I will do that!

Problem is, I switched to Rust for my side projects like 5 years ago and Open Rodent's Revenge would probably benefit from something like CMake but it's so confusing compared to Rust's Cargo.

Awesome :D I spent hours in that pushing blocks around making little forts when I was a kid