There are around 20 persons credited at the end, so that should give a rough estimate. It is quite well done. Animation and graphics is quite expensive to deve

There are around 20 persons credited at the end, so that should give a rough estimate. It is quite well done. Animation and graphics is quite expensive to develop, since iterations in the development loop can take quite some time (think: do a few changes, render everything, start up the animation, check if it looks right, repeat).