It's apples and oranges. C2 has no lighting system, and all logic is made by the user, run on the cpu, in events.
It does have a limited shadow caster, but all official plugs are made to run on both webgl, and canvas, thus the limitation.
Im sure an fx implementation of lighting is doable, and so is 3d, via third party support.
Logic wise there are no limitations, however the proper use of events may take some getting used to.
You might make up some mechanic, and have it working, but at a high cpu cost.
Optimization does tend to be an issue for some users, however the forum is quite good at finding solutions.