The other game in the works (i.e. going through bug fixing & QA) is SPiN. (Gameplay video showing off an early gameplay level found via that link.)

As far as gameplay goes, SPiN is the polar opposite of Zen Bound. It's a hyperkinetic shape recognition arcade puzzle game. So don't buy it if you're looking for something calm and meditative

We're testing the waters with these two games. If their sales work out (i.e. the game generates more sales than it costs to take an engineer away from some other game project to do the port) then further games for this platform certainly make sense.