It was addicting to me for a while but got boring real fast basically because i found out if you just go straight they wont catch you at all. the timing of their spawn is always the same.
suggestion - randomize the spawn time or make is add a second to each spawn. also noticed that after 3 mins or 4 new ones stop spawning, try making an endless mode, you never know.
This is a very cool concept. I quite enjoy it. Though I would like to be able to use A/D instead of right/left.
A good idea and a very addicting game.