Level 34 becomes unbeatable

[Elektron72]

I was on level 34 and had no keys at the time, when eventually, the skull in the corner started shooting fireballs in a pattern that made it impossible to proceed.
https://youtu.be/ray5JHGSrmA

[SlithyMatt]

Level 34 is designed to be unbeatable without a key. So, if you plan on going through that level, make sure you have a key. Otherwise, take a different route. Only levels 1, 47, and 48 are required to beat the game.