Flappy Gopher game that runs on Windows, Mac, Linux and in the browser.

It uses the prototype/draw library.

For Windows, Linux and Mac, build and run with:

go build .
go run .

The browser port uses WASM. Install the drawsm tool like this:

go install github.com/gonutz/prototype/cmd/drawsm@latest

Once installed, build for and run in the browser with:

drawsm build
drawsm run

The code is in the top level .go files.

Resources are in folders raw and rsc.

The raw folder contains raw image files. These are drawn at 3 times the desired final scale. They are drawn without anti-aliasing for easier modification (blurry edges can be hard to select exactly, so we use hard pixel edges in the raw images).

The rsc folder contains the final images used in the game. They are scaled down to 33% the original size from the raw folder images.

There are some .pdn files in raw which can only be opened with Paint.NET. This is not necessary, though, since there are equivalent PNG files for them in raw as well.

For the background music there is raw/music.ceol which can be edited with Bosca Ceoil.

Except for rsc/music.wav, sound files in rsc have no raw equivalent, since they were created directly as uncompressed WAV files.

All assets in rsc will be embedded into the executable via Go's embed package.

To have the executable (.exe) file on Windows display an icon, the Go compiler needs to be given a .syso file that contains the icon (.ico). rsc/icon.png is the icon image. The Windows batch script build_icon.bat converts rsc/icon.png into icon rsc/icon.ico. It then creates rsrc_windows_386.syso and rsrc_windows_amd64.syso from that icon. These files are automatically used by the Go compiler when building for Windows.

There is a Windows batch script shrink_rsc.bat that uses the ZopfliPNG tool - which is expected to be on the path - to optimize (i.e. shrink) all PNG files in the rsc folder. This will make the binaries - which embed the rsc folder - smaller.