Hey there, thanks for your feedback and thanks for enjoying the demo!
I'm glad you noticed how this game relates to Sonic Worlds Level Collab, because I was actually one of the creators of that fangame! (I used to be known as LHTheHedgehog back then.)
Amazing Ocean Zone is an attempt at porting the original level from SWLC, though still highly unfinished because the engine still needs a few tweaks, while Surely Wood Zone is a sort of homage for Kessler12's Wild Wood Zone.