Quite a fun little game though the biggest problem is that you dont know where the spikey balls are going to come up, and you dont have any way of stoping just changeing directions. it just makes it a bit frustrating.
I agree. The original idea was to have an enemy "follow" you on the rails but I was running out of time. I tried to make some challenge- maybe not having the enemies dissappear entirely would help as one could try and bank on that.