I think what made it so easy was mostly because it was 2D, but more important than that, it was 2D vectors. I did a few Flash games myself when I was young, it

I think what made it so easy was mostly because it was 2D, but more important than that, it was 2D vectors. I did a few Flash games myself when I was young, it was amazing, so quick to achieve a result. A decade later I tried doing the same over Unity, and I couldn't do much... Vector graphic allow you to easily draw something quick and animate it easily with interpolation. It also has the advantage of looking great whatever resolution you got. 2D graphic allow you to not be concerned about performance that much, nor does it require complex manipulation to be used quickly.