Construct games should run fine on Android, and many do. It's hard to help without seeing performance information such as the relative CPU and GPU usage of the game. For example if you max out the GPU usage, then it's limited by the hardware, not Construct or any of the software. So the conclusion then is that switching software won't help and you have to optimise the game to be less intensive. If you max out on CPU usage, then you need to look at the game logic. In that case Construct's own profiler can tell you where the time is being spent and what you need to optimise. Usually it's straightforward to make improvements. JavaScript performance is extremely competitive these days and it's rare to see anything that is genuinely slow only because of the overhead of JavaScript; usually it's something else. So these days I don't think there's any performance drawback to Construct and HTML5 games.