Vasanthi Keep in mind when Ashley says: "Construct 2 does support HD games.", what he means is that you can run true HD games but with severe performance issues or even memory related crashes (mostly on low to medium-end devices).
I just want to emphasise that if you see these issues, it's because you're exceeding the limits of the hardware. Often people try to make a game that uses 10 GB of memory, find it crashes, then think "Construct sucks". Or they make a game with dozens of layers and tons of overdraw and run it on a weak integrated GPU, far exceeding its memory bandwidth resulting in laggy gameplay, and then think "Construct sucks". The real problem is you far exceeded the limits of the hardware in a way a professional designer never would. I don't think you need to fuel these misconceptions.
I think you just want the "unload sprite" action? There's no need to proclaim the downfall of an engine over that, the layout-by-layout memory management works fine for many games.