I think you should play around with Amiga BASIC. Could you try: Relokick 1.3
Relokick (free download) will allow you to boot into OS 1.3. It writes the 1.3 rom into ram.
If you are like me you will get sick of Amiga BASIC. The IDE is pretty limited.
I think there was a compiler, sorry I don't feel like rooting through Aminet, but someone else will know.