No death, no boss fights, nothing truly exciting..
other than the addictive gameplay that makes all that other stuff not even matter. I don't care if I played through the same level with different backgrounds. I had so much fun with this game, I'm willing to overlook the fact that I'm collecting food, cannot be hurt, etc.
But still, you have to realize the potential of this game. Make him hurt, make a point, have pits of doom, obstacles, boss fights, music. You could go crazy with this game. You've already established the core gameplay, which is excellent.
So, this game is great, but it can be 10 times better.