Jetstreams is quite a welcome callback to 2.0 efforts from creators like Superopi and Codex, in particular through its structuring. The blocky 2.0 lego brick ground spikes do quite well at filling space, and the subtle detail blocks used to texture them add some needed part-to-part variation. I also like the grass and flower blocks used to add further variation to the outside of the spikes throughout the level. The actual structures fading into the ground spikes when placed in them is quite nice, and helps the spikes feel more "solid" and imposing enough to justify them creating what is effectively a tunnel across the whole level, which is quite a cool way of doing that and mostly works due to how consistent this choice is across the level.

With that said, I'm not a big fan of most of the glowy foreground effects used. I think they clash pretty hard with the designs that consist of mainly sharp corners and flat colours with very little blending, particularly the full screen moving glow bars in the first couple parts or the screen edge accent flashes across the level. Each part of the level being mostly monochrome means the bright glow tends to muddy a lot of the details, which I think could be fixed by introducing more secondary colours as highlights into the block design, particularly the block outlines as these are important for gameplay readability. I do, however, like these effects when they come out of the structures vertically, as this is a neat way of showing the player the intended path ahead while also accenting specific structures that are important in one way or another. This helps my overall enjoyment of Jetstreams, and I'd recommend it for Feature personally, but it's great seeing modern creators still put out faithful callbacks to the legends of 2.0 sometimes.