I assure you I’m not spending much time on this, but I find it fascinating seeing how a change of tools brings new challenges to the way you normally work. There are things I’d change with brushes- the ability to change the brightness/contrast/levels of a layer and maybe some sort of lasso select, but these are little bits that you can manage without. Only having 5 layers to work with means you have to plan ahead quite a bit, but that’s half the fun.