Amazing
This is my second review in about 8 years of coming to this site, so I hope that says something about how special this game is. Okay, honestly, it is probably due to the nostalgia points and love I have for the o.g. sonic stuff. I like the difficulty and the controls. Straight in the veins, no bs dodging game. The music selection is top notch. Though it seems simple, the game is balanced well enough that, with some practice and memorization of songs and patterns, the extreme difficulty is able to be completed.
**small bugs to note:
when you start up the extreme level, the display shows "chemical something, moderate". Also, what is the reasoning behind putting the hardest level in between the moderate ones?
overall, great game... simple and to the point. there is absolutely no replay value, once you beat a song you're pretty much done with it. i'm not sure what you could do to fix that, perhaps achievements or powerups (these would be weird)