The standardized iq test is usually about detecting patterns in graphic images.
I happen to be quite good at that one (I am Mensa member) and it has helped me much in my sewing pattern creation and similar fields.
But to make games you need knowledge and being good at math and logic. It is not enough just to know how to see patterns in graphics. I can attest to that. (I also hated math in school.. so I do not know much but I will try.. I am also more visual person! math equations make me sleep...)
But if you are *open to absorb* and make effort to read the manual, read the tutorials, open 40+ capx examples to examine them.. Really, time is the important aspect! Do you have time to put hours on learning? If not? Then maybe better not start. Yes you need to learn stuff even for Construct2. Yes it is easier to learn, but you still have to learn some.
Another suggestion is to invest in a good nice pen and paper! Draw, write... write the order of things that should happen. Try to break down in the way a computer would do it. It will make it easier. Also if you have problems with math/logic it helps to write down the numbers, draw graphics.... arrows, pointers.. visual aids!