Yeah OpenTyrian was so easy to build for GP2x ! that's why I'm so thankful to the OpenTyrian team
Actually I modified - the Makefile, in order to compile - config.c to manage GP2x buttons and to lower the processor type.
I noticed that there was a problem with config management. At first OpenTyrian start, the buttons were managed and I could shoot everything. Then on second launch I couldn't fire the ennemies My (dirty) solution is simply to remove the config on each launch !