Hello hawkwk!
Oof, yeah, you are absolutely correct in everything you are pointing out (except in the fourth point from the suggestions part: there is a problem to making that). Even in my own post-testing (after releasing) I've found other things that are wrong, need improvement, etc. So yeah, these levels need a whole lot improvement. I have noted all of your suggestions and I will start developing them soon!
Yet, there is something I must clarify: I have made a very important decision regarding Changed 3D; after this update I've come to the realization that completely finalizing the 'Special Edition' game to finish, while maintaining quality, and considering I am the sole developer, will probably take me forever (the time, quality and quantity equation). I have an entire game ahead of me and I am stuck fixing three levels that I haven't even completed them entirely.
Thus far, I've been translating the 'Special Edition' of the original game from 2D to 3D, the one that Dragon Snow is making these days, but the problem is that Dragon Snow firstly made the original game's standard edition, quite obviously, and then expanded upon it quite a lot, thus making the Special Edition, and I, logically, should follow the same developing principle!, (make the base game, the original standard version, then proceed to make an enhanced version, instead of trying to make absolutely everything, by myself) but instead here I am working upon a version that is way longer and more complex, so the decision I made will change that, because I really, really, want to see this project fulfilled in a more feasible and determined way. Basically, I will revert to developing the Standard Version of Changed, which is WAY more possible.
That is without mentioning that the Special Edition hasn't even been completed yet, and is still in-development by Dragon Snow, and I, for the time being, don't have a guarantee that it will even be finished by Dragon Snow (though I hope he completes it, his health problems worry me...)
After fixing these three levels, I will post an important and detailed 'DevLog' explaining everything better.
Either way, thank you very much hawkwk for your detailed comment, and to repeat it: I´ll fix these things you mentioned before continuing with any plan I have, and will post an Important DevLog afterwards to explain everything better!