Ah, thanks for the feedback!
For the first issue, it turns out that's a very quick fix, just a typo. It'll be working whenever the next build releases.
For the springs, how have they been implemented, and what specifically do you mean by "wouldn't go as high"? The initial thing that comes to mind is that the variable jumping could be messing with it, which could be fixed in a couple of ways, but I'll probably need a couple more details.
As for the third issue, I don't understand entirely. Would I be able to get a screenshot of what kind of terrain the issue is being caused by? And what do you mean by trying to walk onto the gap?
For the springs, I used the vector Y action. However, as you noticed when you tried to implement bumpers, it doesn't bounce as high as intended.
The third issue is hard to explain.
First off, have two ground sprites sitting next to each other, one sprite's angle being 330 and the other sprite having the angle being 30. If Sonic tries to walk up one of the sprites, he won't simply walk to the other sprite. He would instead act as if he was walking on that surface until he would adjust to the angle of the other sprite.
Anyways, your welcome for the feedback. I really like the classic Sonic games. And I can't wait until the next update for this addon (I want to use tilemaps so badly. I hate using sprites.)