^^^^^ Just added an extra note above for ClassicWB ADV users and those facing low chipram. All of this will be included in the updated readmes.
It is possible to create a double startup-sequence where the mouse button(s) can be used to select a normal Workbench and a less memory intensive one. It causes many complications however, including problems with the ClassicWB install procedure. The ClassicWB FULL uses so little chipram this feature isn't worth adding. The ClassicWB ADV has enough chipram for the vast majority of programs and the very few that are affected can be run easily from CLI using the method described in note 3.
Mouse startup progs include "mouse.lha" and "getmouseinput.lha" from Aminet.
Other options apart from multiple startups are various utilities off Aminet. These can be used to create a RAD: drive in workbench then reset the Amiga and run the game. If you're interested take a look
here.
Examples are "Max_Reset_V1.5.lha", "ResetRun2.lha", "ResRun_V1.0.lha" and "ResRunV1_1.lha".