I'm sure FFG will work on backwards compatiability... but in all honesty can you really expect them to cater to every single platform and ageing out of date smart phone, especially where there are dozens of versions of smartphone OS out there. It's a $4 app, give them a bit of a break. As a marketing exercise, they will always look at the majority market capture first, and should sales be successful, they will then consider backwards compatiabilty.
I have a HTC Incredible S, it works fine on that. Mate of mine I was playing LOTR:LCG with last night has a Samsung Optimus and it didn't even appear on his Android market.
I attempted to send it across to him via both Bluetooth and email and it wouldn't work.
Not sure if there are emulators or other software that will allow a file transfer...