This level uses the "boilerroom" texture. Again, it's not required, but you really should download the archive.
This one has a box puzzle. Doesn't sound too bad, except space is limited, and there's fireballs. It should really annoy you, especially with the time limit (36 seconds left), so I'm going to give it a
but feel free to tell me if it's easier than I thought.
Video solution!
Older levels in the Ascent series:
Ascent I: The Underground
Ascent II: The Sewers