A lottle slow, so a little boring
Thanks tom or whoever put it up? The users did! It's automated by the score this flash got based on user votes. Thank the users of NG!
So this was a little easy for my skill level. Maybe make a second version with a few added options. Something like keeping the gradual speed increase but in addition allow the player to speed up a few notches and be able to go back to the base speed. This will allow it to get faster a little quicker for the more advanced players. Also, you could then measure distance and time, and maybe have a scoring algorithm based on these criteria.