Would be great to have direct (low-level) access to next things:
- screen API (methods/registers to mark/refresh line, etc...)
- frame buffers (both of two?)
- control the pipeline (buf-swap, sync, etc...)
I have special blitting engine on SIMD and some support of NEON (ARM's streaming SIMD, looks like MIMD) in dev state. Also there's partially deferred render .
I'm sure not only me in the world want to try some custom specialised solutions, engines, any kind of low-level spitialised optimisations.
You're currently providing an official tools & SDK with your game-engine on the top. That's absolutely great but casual, IMHO. And there's now way to impl my custom graphics pipeline. For example currently I have one frame-buffer and two meta-buffers with tries & diffs. So I don't need two fb, swap it, manage dirty lines, you know, etc...