A few of the games have heavy use of graphics and animation also, that I don't really want to have to recreate manually. I've worked on games made with Unity and Cocos2d(ios) since then, but I'm really hoping there's some shortcut I'm not aware of.
There's a ton of JS frameworks out there and it's hard to evaluate which would be worth the time and effort.
Plus I really don't want to have to do this again in the future, so hopefully this can be something I do once and I'm good for the forseeable future (which is why I'm leaning towards HTML5 + JS). Some cross-platform capabilities would be nice too.
Example of the heavy art/animation: http://www.newgrounds.com/portal/view/187047
If anyone has any suggestions, I'd appreciate it.