alright, I just beat the first 8 levels (1 world). here's my thoughts:
Pluses:
+ It's more of the same. Literally. Control is the same, level goals are the same. There's some optional non-score shit to collect, like special coins.
+ Levels are bigger and there's some clever extensions of classic YI environmental hazards and platforming.
Minuses:
- it really *is* more of the same. If you didn't like YI because you're a syphilitic distinguished mentally-challenged fellow, YI DS won't cure you.
- music is awful.
- art direction is a lot less consistent.
So far, I'm digging it. The screen separation isn't an issue so far, and I like the bigger levels a LOT. It's definitely a bit more difficult, but I also think the platforming challenges are a little more interesting, at least in the early game.