Thanks for posting this!
About the bug, it would be useful to see the moment when you died. I can see that power time is 0 but cannot find a logical reason for that if I cannot see the previous action. How did you die? time up? mummy? Please, let us know.
The snake in screen 16 can be perfectly avoided by entering in the entrance and wait until the snake is at the top right to go for the last gem. No need power up for this ;)
Cheers!