Have not seen that before-
If you have a bluetooth keyboard for your computer you can use it to control Heat-
Feel like getting one right now as that is cool cool cool.
Have no idea what a Bluetooth keyboard costs but for sure it is cheaper than most midi keyboards plus that you can use it for... da da da... writing of texts.
Update:
● New: Added support for class-compliant USB Midi Interfaces to be able to play Heat with a Midi keyboard
● New: Added support for Bluetooth keyboards (Octave 1: Z-M; Octave 2: Q-U; left/right cursors for octave shift)
Playstore Link:
Heat Synthesizer