Using full screen image backgrounds (if you plan to) isn't really recommended unless your game is very low resolution, since the backgrounds use VRAM. Other than that, it's pretty easy to make a point and click in Construct, even though it isn't really suited for it. Some things might be a pain to make however, like path based character movement. Maybe check out the path plugin for that, I haven't tried it though, just pointing you in the right direction. Good luck, and check out adventure game studio if Construct is unsuited for what you want, I hear it's pretty good.