Wow, this has really improved a lot since I last looked at it.
Regarding Level 3 (with the spiders), I notice that if you bury them, eventually they'll pop out, and in some cases grab the gnomes before they're actually visible. I would expect that if you bury them, they're either stuck there until you uncover them, or they outright die. If them being able to climb up through the dirt is intended, perhaps this should be made more obvious (maybe some kind of visible tunneling animation?).
Level 5, a bonus goal is to collect some water. It doesn't seem to be possible to actually do this; it will only let me collect the dirt. (EDIT: Same goes for collecting mud on "Pan the Cam".)
Likewise, Level 6 has a goal of "save 5 companions", but I only even have four? (EDIT: Nevermind, didn't realise you can scroll on this one.)
Having to actually click on the bonus goals before the "Next level" etc options come up seems pointless. Can this not be made automatic?
For the level "Mine, Solve and Craft"... this is very annoying, the way that there's the odd pixel here and there of collectible terrain. What disadvantage would having it in a single location give?
On "A Plumber In Caves", is there really any reason the camera needs to be uncontrollable for the first few seconds? It just causes annoyance, especially with how tight the time limit for the bonus is (EDIT: Even more so when you take into account that you can negate this simply by pausing until the uncontrollable part finishes). Also, on the same level, you have to have the stack in the first area perfect for the gnomes to be able to get out; otherwise, they'll hit their head on the thin corridor and turn back (one way to consistenly reproduce this: create the stack such that it's high enough for them to reach the top of the wall, and no higher). Using water instead seems to result in it being even more tempermental. The lava also seems very tempermental when there's a shallow puddle of it - it seems random whether or not any given gnome will die on it. It also seems that even with the best play possible, the bonus time is not achievable by a significant margin.
(Don't take the negativity too harshly; overall, I'm really liking this!)