Post-Secondary Education Direction

Hey,

I'm currently studying at Ottawa University. I applied for Computer Science, Software Engineering (Since those two are what I wanted to do), and Business (for kicks).

My marks didn't turn out as high as I would have like out of high school, and I ended up with an alternate offer of of business of Economics; So i'm currently in my second semester of economics at Ottawa University.

I've applied to computer science for my 3rd semester; but being generally unmotivated in economics my marks aren't all that great, and its not likely i'm going to get into it.

So, should I continue at university trying to switch to computer science (possibly with no end in success), or switch to a college program?

Will I be able to enter game development with only a 3-year college diploma in something like "Computer Engineering Technology - Computer Science"?

--Grant