Combo Breaker ~!~!~!
1- Well ... The FrameRate performance is pretty good , I get 45 fps for an average platformer in my crappy 2007 integrated DirectX 9 Card PC , And 30-60 for mobile device ... For an HTML5 Engine the performance is pretty stable !
3- Handling what ? In C2 you can create a variable with any name and any other stuff ... ( Screwed it there ... to lazy to edit it :p ) There is no high-score and bla,bla,bla ... You just create a variable and the job is done !
P.S : Welcome ! If you need anything , You know who to ask !