Basically I hit the limit for what the old program could accomplish. With Blender there's basically no limit, besides my graphics card melting, my computer catching on fire, and the fire spreading to the rest of the apartment, rendering (ha ha) me homeless.
I got a more in depth explanation here:
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This is some stuff I'm testing out at the moment ( I didn't put any effort into this animation, just testing out collision and stuff).
For example, the breast collision you see in this Blender render, is not possible with my current program, the cube would just clip right through.
(The game engine will be the same as my current one, the change to Blender will just affect how images & animation look.)