Could have been worse.
Could have been one of the Apple hockey Puck mice that came with early iMacs. I still have no idea what possessed them to think it was a practical or comfortable design to use.
That said I recently re-acquired my iMac g3 (it was claimed parts along with others from a job where pay was not forthcoming at one point, got left in storage, given to a friend to convert to a cat carrier and now found its way back though without the original keyboard and mouse).
Lots of retro gaming to be had including a nice Marathon session and Doom on a proper CRT.
Gimp icon because you had to be one to use that sodding mouse.