I like Construct, I know I don't post my prototypes so no one knows. However, I also like Game Maker - a dirty word around here - more. I'm not sure how Construct credibly proves its worth against Game Maker. GM is mature, stable, actively developed, has an HTML5 exporter (among others) and costs $25USD and also has future proofing in terms of upgrades - usually just to the next version. Game Maker has already survived 12 years; Construct is going on 4 with limited success. Why not just copy the way Game Maker does its sales: free limited version, paid full version, and completely closed source. After all, you are competing for the same market. You may have to alienate the people who liked Construct because it was free - they are no longer your market and many of them may have become spoiled by C1: it was a fantastic piece of free software without equal in terms of free "game makers." If C1 is what they've come to expect for free, imagine what they expect to pay for.
All of the above is unimportant. I won't pay $61.94CAN for C2 when I can get GM for $24.32CAN (based on today's XE values) until it proves why I have to pay more.
Edit: USD it is and removed insensitive link.