Free Fall

I used to play penguin pursuit on lumosity where the direction keys are based on the penguin's perspective and you have a top down view of a labyrinth that periodically rotates - so I was excited for your concept.

I like that the music is upbeat without being stressful. I like that the momentum resets when you change directions, otherwise it would be very stressful.

I decided to quit during the second key level. I liked the addition of the key, but after losing twice trying to get the first key, I predicted it would take many tries to successfully get three keys and the objective without dying. 

Overall I enjoyed the concept and the music. It was a bit strange for me to use QWE instead of AWD. I didn't end up using W because I forgot about it and didn't fully understand what W did - maybe that would have helped me do better. My first reaction as the ball is falling toward danger is to double tap E.

Because you asked about grammar:
"Did you notice numbers in the right hand corner, didn't you?" would read more naturally as "You noticed numbers in the right hand corner, didn't you?" or "Did you notice numbers in the right hand corner?"

"This is your time and perfect time of level," - I recommend changing this to "This is your time and time perfect time for the level,"