Man, I loved it! It was so enjoyable playing this. Please make more. I cannot express how much I love this game. Good job!
The thing I really liked about this game was that it doesn't tell you the rules and you just have to figure it out on your own.
I only had one problem: the restart key R. I kept accidentally pressing 'r' key when trying to toggle between trajectory and speed display. I killed my game couple of times that way so I physically removed the key from my keyboard LOL. It would be really useful if you could change the way you restart game. Maybe a confirmation box pops up if haven't crashed?