snn you did NOT make that level for this contest you fraud are you trying to pull a fast one on us
Seriously, though, the underwater grate extravaganza is a super-neat concept, though a number of the gates are oddly tankable if you have a powerup compared to the finesse needed to get to get by unscathed. I guess that's a legitimate way of doing things (after all, there's still a limit to the number of powerups, so you don't get unlimited tankings), but an unusual one.
That said, the HDMA effect in the layer 2 section, especially combined with the lack thereof on layer 2 itself, is a bit nausea-inducing. And don't think we didn't notice you sneaking a few skellingtons into the level!
In non-judge matter, something about Magma Chamber really strikes a chord with me. The gameplay, though solid, doesn't try anything too wacky, and the æsthetic, though gorgeous (and not without some technical fancy feets-work), aims a bit towards the minimalistic side in effect. But it all just comes together so very, very nicely. Sometimes less is indeed more.