The game has a lot of bugs. Sometimes, the character stands on the edge of a platform and it can't jump to the next one -the game won't simply allow you to jump forward, only upward or backward. It wouldn't be that much of trouble if it wasn't that this bug forced me twice to die at the beginning of the second level.
Sometimes the enemies move too fast in a very narrow platform, forcing you to jump over them -which costs health. Now add the aforementioned bug of jumping forward and hitting an edge, and you're doomed for certain death. And what's the point of having enemies with different colors if they don't do anything different?
I can't say anymore because the jumping bug drained all my patience in the first scene of the second level. That's how annoying it can become.