I like the artstyle of the game quite a bit! Lots of polish and interesting badniks are in this game. Only problem mainly is the level design, where I was stuck ~ 4 minutes in. Overall very strong start.
Man, I have no words to express how this game is amazing I love so much things that it'll have write a big text of it.
1-The game art
The sprites are simply outstanding, they are so life somehow that I can't explain very well, they are very animated I can really fell that I'm seeing Sonic in front of me, that I control him, its so amazing; The Sonic visual is unique he looks like a fusion of modern Sonic with the classic one and it give to him an familiar but totally new and increadible at the same time style just impressive, but no just Sonic's sprites are amazing all the characters sprites are amazing.
Dr Eggman sprite are preatty diferrent but totally new and give to him something mire realist but stel cartoonized (I loved it).
Tails and Knuckles sprite has same feeling as Sonic, fluid, live , cute but cool (I loved the Knuckes's hat reference, just amazing)
The enimies, ohh the enimies, they are simply amazing all of them are preatty unique and live and all their details about when ther are hitted and the flickies (I think "flickies" is right but I don't know) they fell out jumping and they are so different from each other that is just amazing
The stages have big visual impact, beacause they are preatty flashy, by having several things happening, and creatives differents, and uniques and if the other game scenarios continues like this it'll going to be so awasome.
2-Controls and gameplay
The controls and the gameplay are uniquies.
The controls work perfitly. The gameplay omg it's just like a Sonic game need to be, fast and controllable, I can go for whateaver I want eassly and its just amazing, and I loved all the Sonic's abilities.
This game made me feel like a kid, its so magical, vast and it bring me an increadible adventure felling.
I feel free, fast, playing this game and now I'm in love with this game.
This is the best Sonic 2D game that I ever played in my life and I think it have so much pottencial to be even better.
I'm very anxious to see how will be Tails and Knuckles gameplay, the game story and all the mechanicals that will come.
I think could be cool a costume system for the game.
(I'm not so good at english so sorry if you don't have understood very well)
It's definitely a great start. I love the overall mood of the game, and the small details in the sprite animations are really cool to see. I'll definitely be back to play this when the full game releases (or maybe sooner if you come out with a few more demo stages before the full release).