A Game Boy emulator in C# / .NET, heavily based on https://github.com/davidwhitney/CoreBoy after realizing I forgot about timing 😅.
The WinForms version is running pretty smoothly, including sound, although not all of the test ROMs out there are passing and GBC support is not all there yet. In short: there are better emulators out there if you want to play games.
But if you want to hack something together, go ahead and have fun!
The GB.WASM folder contains a WebAssembly version of the emulator, running in the browser. It's performance should be on-par with the WinForms version, but running in your browser!
If you want to try that one, use launch.bat to publish an AOT version of the emulator and start a local web server.
Here are the key bindings (click somewhere on the page if they don't seem to work):
D-pad Up = W
D-pad Left = A
D-pad Down = S
D-pad Right = D
Button A = K
Button B = O
Start = ENTER
Select = BACKSPACE