Construct 2 is a very powerful engine, and a lot of great games are being made in it! Describing it as 'point-and-clicky' really doesn't justify it at all.
I didn't mean "point-and-clicky" in a negative way; sorry if it sounded like it.
Construct 2 describes itself as "A visual HTML5 game development tool", Impact however is a programming framework. Someone without programming experience wouldn't be able to do much with Impact, but may still be able to make great games with Construct 2.
We're focusing on different target groups and in my book that's great. It's what HTML5 needs to succeed :)