this game has a lot of effort put into it and it seems that the whole team had a lot of fun making this. Art is super good, the dialogue is actually really cute and fun, really groovy music, and probably my favorite part is that Trees is super responsive to control, has a fun and simple moveset, and had a good sense of speed along with easy ways to gain speed which would make speeding through levels really fun.
However, I think this point of critique comes from the fact that I'm just not a huge sonic fan in general and I have this same problem with most 2D sonic games. The levels in this don't really compliment the moveset and seem to big for their own good. Although not impossible to quickly speed through levels there are a lot of random 'bumps' in the road that just unnecessarily cut your speed down. Maybe I just don't get it cause again, I don't really like sonic games, but the same problems I have with those games regarding level design also pop up in this game.
overall, I bet people who like sonic games will love this and overall I really like this too! Good Luck and hope this game gets good recognition! :)