Wow
This game is simply amazing. The sheer lonliness of no music and the fact of him saying "hello?!" at every beggning of stage makes it feel lonley and deep. The bubbles and him being naked on a BMX bike add comidec affect.
The thing does offer challenge like you said. I had to remember at certain parts I died because they caught me off guard. Good thing that it respawned me at the same screen so that I could try again.
Starting at screen 5 it got harder. It took way more tried to get past that then the others. At stage 6 I was beat. That part where it says you coudn't back peddle was my stopping point. I tried and tried and tried, but coudn't get past it. If you could tell me how that would be nice.
I would like to see more out of you, though. And I would also like to see where the trail of bubbles leads. Ha! Bubbles. The last man on a frozen Earth who knows how many years after everyone died desides to follow a trail of bubbles. I do wonder how it froze? Maybe global warming? Nah, more like global cooling!