I had a bit of slow-down on Saturday, but at all other times it was very smooth and fast. Finished the first three or four worlds, and worked through most of the creation tutorials as well (I watched a fair few of them, because quite a lot of new stuff and some of the old stuff needs refreshing too). The direct control stuff is cool. Have done some really tiny experiments with that, and also tilt controls, but it's not as easy as it looks. But all the logic circuits are really awesome. Very cool to be able to program stuff in such detail. I was already thinking about what kind of clever stuff you could do with having a sensor on your bullet, and then have enemies avoid those in some smart way.
I had some technical slowdown in the Avalon level when things were going really fast at some point (not giving details to avoid spoilers) I had a lot of tear (this was 720p). On the other hand I have no noticeable pixel crawl or anything and picture quality is really smooth, but that could partly be because I'm playing in 720p mode on a 768p screen with no 1:1 pixel mapping possible.
I had some technical slowdown in the Avalon level when things were going really fast at some point (not giving details to avoid spoilers) I had a lot of tear (this was 720p). On the other hand I have no noticeable pixel crawl or anything and picture quality is really smooth, but that could partly be because I'm playing in 720p mode on a 768p screen with no 1:1 pixel mapping possible.