Thanks for the info. Like I mentioned, my C++ build actually started working fine. I use https://github.com/360Controller/360Controller/releases to be able to hook up my Logitech controller which appears to work fine in Godot and now Kha/C++.
I'm trying out Armory 3D which bundles Kha and Krom with uknown versions (don't know when they were built). I cloned and built the latest version of Krom and replaced the Krom.app bundled with Armory but it seems it is not compatible with the bundle version of Kha:
Trace: TypeError: Krom.lockVertexBuffer is not a function
at $hxClasses.kha.graphics4.VertexBuffer.lock (krom.js:30902:21)
at $hxClasses.kha.graphics4.ImageShaderPainter.initBuffers (krom.js:29082:102)
at new $hxClasses.kha.graphics4.ImageShaderPainter (krom.js:29039:7)
at new $hxClasses.kha.graphics4.Graphics2 (krom.js:29854:22)
at Function.kha_SystemImpl.init (krom.js:17095:90)
at Function.kha_System.start (krom.js:16848:17)
at Function.kha_System.init (krom.js:16842:13)
at Function.Main.start (krom.js:197:13)
at Function.Main.main (krom.js:161:7)
So I'll go ahead and try to update Kha as well for Armory 0.5 and see if it helps.
Thanks for your input.