Collision with mesh

I still can’t figure out what to do with my mesh passing through the objects in GE.
heres my blend file.
bitoy walk.blend (422 KB)

please enlighten me.

I replaced the motion sensors with servos, with wont allow passing through objects. I made a forward, a backward, and a stopped(to prevent sliding)

I also set up an empty as the main bounds/controller thing(too tired to think;)) The armature is parented to the empty.

I think thats everything,

Attachments

bitoy walk.blend (424 KB)