After your new version, the level has changed, it is much more positive. There are again some glitches in some places about the room to run (especially the tunnels).
I had still struggling to find the passage, as old as the new version. Thus, I allowed myself to watch the level with the editor. I think the secret passage is much too hard for Sonic. But I think, however, that, magically, this "difficulty for Sonic" can be solved if the transition is placed further the level.
A portion of Level Design 101, SRB2 WIKI I advise you to read to learn more: "The difficulty level should be increased gradually as the player progresses.
I do not know if others designers feel the same as me, but I personally will not cast secret passages in the beginning.
... Ah, yes! Look at this screen, I could not go back Sonic :
To fix this, I advise you just put a yellow spring.
I had still struggling to find the passage, as old as the new version. Thus, I allowed myself to watch the level with the editor. I think the secret passage is much too hard for Sonic. But I think, however, that, magically, this "difficulty for Sonic" can be solved if the transition is placed further the level.
A portion of Level Design 101, SRB2 WIKI I advise you to read to learn more: "The difficulty level should be increased gradually as the player progresses.
I do not know if others designers feel the same as me, but I personally will not cast secret passages in the beginning.
... Ah, yes! Look at this screen, I could not go back Sonic :
To fix this, I advise you just put a yellow spring.