I got the first one when I still had a Palm device. Moved on to buying the plant and fish tycoon games and all the VV and VF games for PC. Tried the ones on Android on a phone and tablet, but stuck with just the VF series there as the VV graphics are warped.
I, too, think I got the first one I played from Handmark or Big Fish. I remember thinking Last Day of Work was a clever name and looking at all the other games available.
My kids all got addicted watching me play, and when I load a new game up by LDW, they all beg to play and put it on their PCs. They were just a bit disappointed that VT isn't on PC (or I cannot find it). They do still play the VV series once in a while.