HTML5/Canvas games are mostly bound by drawing performance. Modern browsers use hardware acceleration where available, but it could very well be that your GPU is black listed for missbehaving OpenGL drivers. Intel GPUs are the worst offender here.
If you have proper hardware acceleration, a game like this should run fluidly even on low end systems. Case in point: the similar looking X-Type ( http://phoboslab.org/xtype/ ) runs with a steady 60fps on an iPhone4S.
If you have proper hardware acceleration, a game like this should run fluidly even on low end systems. Case in point: the similar looking X-Type ( http://phoboslab.org/xtype/ ) runs with a steady 60fps on an iPhone4S.