Are there specific browser requirements? I just get a black screen with one line of text at the top on both firefox and chromium.
Edit: might be my GPU is too old; console shows
Failed to create WebGL context: WebGL creation failed:
* tryNativeGL (FEATURE_FAILURE_EGL_NO_CONFIG)
* Exhausted GL driver options. (FEATURE_FAILURE_WEBGL_EXHAUSTED_DRIVERS) cpc.js:24:370