i agree
i think i've lost about 2weeks on the camera / movement coding, and actually i've nothing on my hand. (i mean i'm still learning )
but it's also true that i wanna know what the code doing when i press a key :P
so i prefear to code it by my self.

i've purchased bitzmax too
i like it 'cause it's easy to code, but the engine is.. frustrating, so i think for the eye and programming satisfaction, A7 is the right choise.

i didn't know Unity 3D...