With puzzle 5 (spoilers I guess) I initially went with the “well if I just push a yellow diamond up there followed by the heart that should duplicate both of them” approach which I was fairly certain was too easy but I found useful to do as I like to physically do the “too obvious” solutions for difficult puzzles just to see exactly how and why they fail. When I saw that was clearly a dead end I spent a minute or so seeing if there was any way the warp blocks could be used to remove the diamond from that last arrow space, which clearly was not possible. However, when trying it just for kicks I did get the warp block duplicated below which was a big “oh hey, that’s useful” moment. I realized almost immediately after that I could just push the diamond and heart in there, duplicate the box twice and have enough of them to reach the goal.
I was crossed up with some of the logistics afterwards for a bit, first I cleared the facing down warp box out of the way to have more room to push those two blocks out of the up facing warp block, but that resulted in the upper block being stuck on the top row and being unreachable (I believe I duplicated it once and thought that might be enough, but when it happened again with the other duplicated warp block I realized it wasn’t quite right). I then messed around with pushing one warp block into the other, which quickly proved to be unviable. After that and pushing the blocks back and forth between the two warp blocks on their original rows for a bit I realized I should just push them into the upper one, then move the lower one out of the way at which point the puzzle was solvable.
So it took me a bit, but while in writing that reads like a lot there wasn’t really a lot of dead time going “what the heck do I do now?” If I didn’t stumble upon duplicating the warp box via trying something obviously wrong perhaps that would have taken me a bit longer to figure out (this is why it is always worth trying obviously wrong stuff). I think it took more time than 3 and less time than 4 if that helps?
FWIW I think having the warp blocks (both the 4 and 5 versions) be both pushable and warpable, but only in certain directions, is a rather clever little twist that can open things up in some interesting directions.
I don’t really like that duplicator animation BTW. I hate to criticize without coming up with an alternative… but I’m struggling to come up with one. I hesitate to disagree with the actual game designer as that likely means I’m wrong, but while it could use some minor… non-giant brown line visual refinement I think having a puzzle before this one in the theoretical full game that more clearly teaches the mechanic would help with the initial murkiness more.
…I ponder if having the new duplicated ghost that player control switches to having like its eyes flash red or something would perhaps be better. I worry about adding any really detailed animation as it would necessitate play slowing down a little bit and delay taking that next move (I just played a puzzle game that did this and it can be irksome), but a quick flash should be almost instantaneous while still being enough to hopefully grab player attention? The actual duplication mechanics wouldn’t be spelled out, but again I don’t know that needs an animation makeover as much as a more direct introduction. Also I don’t make games so I might be an idiot.