Space to make a "plop" Drag to make a "wave thing" Turbowarp is recommended: https://turbowarp.org/1256185824?fps=60 If you are using turbowarp press z to make it hd. I accidentally favourited this, ydydoysrskvk;£,,@,),),/:;:() This works pretty much the same way as the 1D one, with the wave equation, which I'm beginning to realise is even more cool than I thought but still so simple. The equation used to make a positive blob in the direction the mouse is moving in and a negative blob behind (for the wave making) is actually significantly bigger than the wave equation.