You can use Vertical Space Shooter from inside construct2. Thats what I did. No need for me to upload capx therefore.
Use firefox 23.0.1 or iphone/ipad/playbook/bb z10
you MUST NOT use debugger, and just start normal testing - debugger will suprisingly make everything work as intended.
Problem: After just few seconds render stops working, so things are frozen in place BUT logic involing "dt" is doing fine, exactly what it should. After that pause render catches up and never stops again.
I started using construct from 139 but it happens in all versions ive tried.
If you cant replicate this I might record whats going on. Just let me know if it doesnt happen to you when testing for it.