Fun little hold, I ended up enjoying it more than I thought I would, given that custom element holds seem to be hit or miss for me (usually miss). I think it helps that the rules of each game are pretty straightforward.
For the games themselves, the feather matching was probably my favorite of the bunch. Even though most of these puzzles weren't very difficult, I found it fun trying to optimize most of these rooms.
The one with the + and - orbs was probably my least favorite, but that might just be because I got stuck on 1N for a while and needed to look up a hint.
Some of the puzzle designs ended up seeming complex enough to where I often felt lucky to solve a room, even though I usually had a general idea of what needed to be done - actually doing it was the tricky part.
Commanding the robots was pretty fun, although most of the puzzles didn't seem too complex. The 4 part one was rather tricky, but other than that, I ended up wishing the level lasted a bit longer.
The final level was pretty neat, although again I found myself feeling lucky to get through some parts. I think I started to get a better grasp of how to safely traverse the elements of this level at the second half of the last room, which is a bit of a shame.
My only other gripe with this hold is that all the secret rooms were in one level. Oddly enough, I didn't find these puzzles too challenging (then again, that's comparing it to 1N, which I thought was evil). Anyway, I would've liked to see secret rooms on the other levels too, although I understand perhaps those games didn't lend themselves particularly well to difficulty increases (though, arguably, a couple of the required rooms could've qualified - 5N of the giant tree, and 2N1E of the robot level come to mind).
Anyway, I rate this a 5.5 for difficulty, and a 7 for fun.
