I found this a very fun and interesting game! I've only played a few games like this before, but I also found it quite hard, so I might not be the target audience. The speed made navigating quite hard, but I don't play games which require the arrow keys, so it's not navigation which comes easily to me. I bet this would be really fun for people good at this sort of keyboard control!
Are the tips the rotating squares? I was unsure if they were something I had to collect, so I kept trying to run over them.
I really liked the top down map concept. Overall, well put together game!