I’ve been playing with this app for the last few days. It is difficult to use for a couple of reasons. Firstly, there is no documentation for the app at all, and no web site for desperado anymore, and secondly, the app is almost entirely icon driven and very difficult to make sense of.
It really is a whole trial and error exercise, which is on the one hand enjoyable, and on the other hand quite infuriating.
And another thing, you can only run Baby Hedgehog on a pre=OS5 Palm device, so I’m running it on my TRG Pro (which is wonderful), powering a Swivel Systems SG20 MIDI module, which clips onto the bottom of the device connecting via the serial port.