What does -The Cobra bites himself- mean?
If the head of the cobra crosses any part of the longer and longer body, your cobra loses a life
When is the Crazy Mode accessible?
The Crazy Mode gets unlocked when you finish the Normal Mode
How long does the effect of a Bonus pill last?
Once you get a bonus, you can see a small red rectangle on top of your screen getting darker and darker. When your bonus time is over, the rectangle is black.