I was just wondering if any one has used the Tower Defense tool kit and, the 3D Tower Defense Starter Kit and can share the performance pro’s and con’s between the two for mobile app development.
Hi John,
actually it’s “3D Tower Defense Starter Kit” 
Regarding performance, the kit has a pool manager logic for nearly everything, be it enemies, projectiles or particles. It comes with all models, textures and sounds and runs pretty well on newer devices. Depending on your targeted devices this means lots of projectiles without hickups. For the user interface, NGUI was implemented since the initial version and the kit even includes mobile controls (and first person shooter mechanics). I’m curious to see what others come up with.
Disclaimer: I’m the owner, so I am biased.