I feel like the dash range should be just a little longer, most of the time I find myself being pixels away from killing someone, and is the main reason I died. Perhaps visually no more, but definitely slightly longer.
First of all, there should be a kind of scoring system put in place. For instance: Each time a red line leaves the screen, you gain 10 points, and each time you get hit by one, you lose 20 points. Second, there should be some kind of level system too. For example: After 30 seconds, increase the speed and frequency of projectiles by a small amount.
 "Dojo of Death"){kind=icon}
 "Siegius"){kind=icon}
 "Reaction Time Tester"){kind=icon}