You could technically run it under an i3, but you will have
severe performance issues once you get your park going.
That should be resolved in 0.1.3.
This is an alpha, things won't be polished or optimized. We need bug reports to help mash out the underlying bugs and issues before we get a stable, fast and responsive client.
Same here, ran the game on five different GPU's so far, no major problems whatsoever. GTX980, GTX770, GTX470, GT950, the surfacebook GPU, and even attempted to run it on the onboard CPU GPU (that was a disaster).
We've not set a date for future versions of alpha and beta yet. It'll be ready when it's ready. [happy][up]