[pbalau]

Addictive game, well done. But why do you think WebGL is going to still exists in 20 years? Flash seemed to be here to stay, considering how much content was made for it, then "suddenly" gone.

/edit:

Whether WebGL as a whole will be replaced by WebGPU remains to be seen, but the 1.0 feature set is simple enough that I can imagine web browsers implementing those in terms of WebGPU, whereas the 2.0 features are more likely to be dropped, because they were never expected to be universally supported.

Well, this is a possible reason, but I'm not sure I agree with.

[debugnik]

Flash was a proprietary browser plugin that went out of support (although you can still play .swf files with the standalone projector or Ruffle), whereas WebGL is a web standard which is very easy to implement on top of OpenGL ES; and that one is also a standard with many implementations, both in drivers and as open source libraries on top of more modern APIs, like ANGLE.

So I think WebGL is not going away anytime soon.