ok 2 tested so far, mortar melon loads and is bit laggy compared to other games like angry birds and clash of clans etc.
Square eater stopped working unfortunatelly, wasnt able to play at all.
mortar melon i think its not made in Construct2 entirely, they even said specifically that they had a Demo in 2 days, which can mean they only needed a demo to attract some sort of investing to build it in some other engine, or using another language however the clash of clans and angry birds i think are native coded games, or by using some custom engine, or even unity, which runs much faster then the c2 framework, so you cant really compare them... a c2 game will always get stuck at around 35-45 fps on mobiles, if your lucky youl get 50-55 depends on how much graphic assets the game has in same time on screen and how willing you are to invest time in optimizing the code which can save you a lot of FPS. hope you understand. and hope you found the answers you wanted in the games you tested, unfortunately i cant actually give you my games, cause i had to remove all from google play because of some cordova update security issue. im to lazy to recompile them most of them i dont even have the source anymore.
let me know what you found in your test that you did on bluestacks im curious