Take a hike, Hoebear
Flying solo, Kalimba feels totally different. I think that's for two reasons, one being the single-player campaign's "unique" mechanics -- like color-swapping, ice platforms, and anti-gravity. I'm fake-quoting "unique" because, since I didn't make it very far in the co-op campaign, it's possible that these features would have popped up eventually.
But the other reason is that, like I complained about last time, co-op's fundamental four-totem stacking mechanic is simply broken. The timing and positioning requirements are just too precise.
One brain, using one controller, can maybe manage to coordinate two totems well enough for Kalimba's levels. Hell, a one-player four-totem quadruple-jump would be hard enough. But adding a layer of human communication to it, and still expecting timing with 0.1-second precision, is just cruel sabotage.
The single-player game was just interesting enough to see me through its first third; the regular introduction of new mechanics was neat, but the demanding platforming wore me down.
As for the co-op, I can only summarize it as unplayable.
Progress: Solo, 33% (beat the first world/boss); co-op, gave up in the second level.