I recall one of Jobs' major points against Flash was not providing support for touch-based interfaces. Here we have a clearcut example that the tool you use (HTML5) does guarantee you anything in the final product.

On a contrarian note, a cross-platform game framework here could perhaps provide for remappable controls and performance tuning. This same cross-platform framework is labeled by Jobs as a threat to Apple's marketshare.

Perhaps Apple should not be so quick to bludgeon developers with claims of The One Best Way to the exclusion of all others.