I really liked the game ! There are some things here and there like the player movement feeling too "smooth" (maybe try using GetAxisRow instead of just GetAxis), or the sign that can collide with the player (i think that putting it as a background object would be better) or the music not looping if you take a long time to play the level. Also, don't forget a jump animation ! Otherwise, great game, i liked it.
PS: Could you rate my game ?