A 3D platformer about a squirrel with a grievance against an eagle. You run, double jump and spit nuts at whatever is grumpy enough to be in the way, across five worlds that run from an autumn valley to a set of city rooftops. There is a mouse who lets you ride on his back when speed is needed. Nutty Rush is gentle, generously checkpointed and clearly built for someone young, and it is put together with more care than most games aimed at that audience.