Debugging?

[KungPhoo]

Is it possible to debug with an emulator, so I can have breakpoints and read variable values? If so - how would I do this?

[drmortalwombat]

I can recommend two options.
1.) Use vice and load the compiler generated lable file with the -moncommands:
C:\C64\GTK3VICE-3.8-win64\bin\x64sc -moncommands ninia.lbl ninia.crt
keep the .asm file around to look up what happens. Using the -g option in the compiler will generate a more annotated .asm file.
2.) Use a source level debugger such as https://github.com/MihaMarkic/modern-vice-pdb-monitor which has source level support for oscar