Fusion is the first level in the 4-part Fusion series that is generally above average throughout, with the unique characteristic that it is carried by genuinely one of, if not the single best part created in the entire game -- the asymmetrical dual. This dual, despite clearly not a modern creation, has its roughness vastly improve its atmosphere. All the structures around the 2 icons remain motionless yet look wildly deformed and rugged, with their insides molten and the only solid components remaining looking glass-like. Red-hot lasers dance in a uniform pattern across the screen, torching the air itself and ensuring that the atmosphere scorches with an awesome intensity. And yet, in spite of all this, you miraculously blaze through, each icon weaving through each others' paths with improbable velocity, through otherwise lifeless air; not a thing in existence but you looks capable of surviving a millisecond in this man-made hellfire, formed within a fusion reactor.

While I do wish I could say as much good for the remaining parts, they are unfortunately a mixed bag in terms of quality. The first few parts have strangely ashy grey colours which don't look all that great in the context of the level, and after the aforementioned dual, you are just haphahazardly thrown into this comparably very lackluster UFO/ship hybrid section that feels extremely static, with no complementary change in the song. The rest of the parts are much better in quality, having some very neat effects and bringing back the bright vibrant colours, although they are plagued by minor issues and the level also never reaches close to its peak again.

Fusion, despite its extreme inbalance in quality, is still overall a very solid level, with the added bonus memorability of hands-down the best-looking dual part in the entire game.