No, the 68K community is not dead. There are still some notable 68K programs in the works or being released nowadays.
On TI-BANK website, Loulou has released two new games for the TI-89. The first one is called Piou Piou Traverse la Forêt (Piou Piou Goes Through the Forest). It's an hybrid BASIC game where you must help a bird called Piou Piou jump on platforms without falling in the pit or off the screen. You choose the angle and jump speed to aim properly towards the next platform. Here is a screenshot:
It is inspired from a similar Facebook game by Kek. Piou Piou Traverse la Foret can be downloaded in
TI-BANK archives.
The author also released a game called Palet. This one is written in C and is similar to Pong, but with a twist: You can push the ball so it bounces back faster (if you time your movements right) and there are power-ups spicing up the game. TI-89 and 92+/v200 versions are available.
You can download it
here.