Okay so I really like the concept for this, having your whole keyboard as a guitar hero controller makes a lot of sense because a lot of us have grown up touch typing already. the visuals were good and it felt like the timing was about right.
My big piece of feedback is that it's quite monotonous to hit everything right on the beat over and over again. The fun thing about rhythm games is the variations in rhythm as you play through, hitting syncopation and triplets and trying to get yourself back into the rhythm after you mess up a note. Because the game was basically just waiting for me to hit whatever key it was on on my own time, only worrying if I'm on the beat when I do so, there didn't feel like there was much at stake.
And this one is tricky to do with such short time but, I need some music! :)
Sorry for the wall of text, I'm passionate about this evolving haha