there is a bug that sonic whan he lands he is in the ground for 0.1 second and he is touching the wall weird i am 90% sure that you can fix it you need to do a right click in the project panel click create and click 2d and click physic matririal 2d and click on the phisics materical and turn the friction to 0 than click on the player and look at the collider that on the player and whan you see materical put in it the physics material but if it doesnt work i dont know