In addition to 39 playable games on my Dell Axim:

"Work But Are Too Slow":
Digdug, Gorf, Wizard of Wor, Xevious, & Defender.

"Not Quite Right":
Contra, Crossbow, Karate Champ, Rampage, R-Type, Track 'n Field, & Tron.

"Show Up, But Don't Work":
Jr. Pacman, Pole Position, and Tapper.

Can anyone beat this list?

P.S. Playable games I have:

1942
1943
arkanoid
btime
bublbobl
bzone
carnival
ckong
congo
dkong
frogger
galaga
galaxian
gberet
gng
invaders
joust
junglek
mappy
mario
missile
mooncrst
mpatrol
mrdo
mspacman
nrallyx
pacman
phoenix
pooyan
qbert
qix
rallyx
robotron
starwars
tempest
timeplt
vanguard
venture
zaxxon