Well a reboot after install helps.
Last night, Coin Dozer was pretty choppy. After I powered up this AM it looks much improved. Still a bit sketchy in the animation, but I've seen that on an Android tablet before as well. Something about that App - it rarely looks smooth when first starting up. All the permissions snooping around maybe???
Rail Maze is running buttery smooth.
Gateway NV53, Windows 8 Pro AMD 2.0 GHz dual core, 4GB RAM, on board ATI Radeon HD 4200 using 1/2 GB of System RAM...
BTW - BlueStacks is @ version "Beta 1."