Complex sentence: Certain environmental obstacles are excluded from this mode, such as the tornadoes in the Death Castle, and upon death and respawn, Arthur is given the POW power-up, which lasts until Arthur gets hit by an enemy.
Split into simpler sentences: Certain environmental obstacles are excluded from this mode, such as the tornadoes in the Death Castle. In addition, upon death and respawn, Arthur is given the POW power-up, which lasts until Arthur gets hit by an enemy.