I'm not planning to work on this project in foreseeable future. Still your feedback may be useful someday.
In the original code gamepad support very limited.
Looks like it is possible to implement better gamepad support, maybe someday someone will do it.
You options right now:
Windows:
- xbox 360 controller (should work out of the box)
- x360ce
- any software that can map gamepad to the keyboard keys
- try this test build**
Linux:
- any software that can map gamepad to the keyboard keys (QJoypad for example)
- try this test build**
Android:
- looks like GPD XD and xbox 360 controller works
- some application that can map gamepad buttons to the touch screen buttons
- try this test build**. Tap in the top left corner to launch keyboard configuration and little to the right to launch gamepad configuration.
** - Most likely test builds won't work