I remember trying to run vanilla minecraft on the UL30A a while back. Funnily enough in windows it barely ran (around 1 or 2 fps in open areas) but on ubuntu it ran smoothly. I never tried the OptiFine mod though.
unbuntu uses less resources than windows leaving more for mine craft?
Minecraft is surprisingly spec-heavy.
I think my phone could run minecraft so I wouldn't worry about it![]()