Check this post from a few hours ago, providing a lot of links to previous posts on this.

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It's not a 2D plot, it's 3D. Maybe try plots allowing 3 axes including categorical data?

EDIT: nevermind, I see that a link was added above by ATpoint. We really need a way to promote in-line replies as the answer.

This is more of a comment, than an answer, but jrj.healey's answer is perhaps a better match than a typical "joy plot", as it renders the z-axis at an angle. However, another option that may be less confusing is a 2D heatmap. It doesn't rely on your audience guessing at the y-axis or "height" of the datapoint, which already has an ambiguous x-axis position, by shifting the z-axis off-center.

A 2D heatmap gives you a strict grid of chromosome rows, genomic position columns, and cells are colored from low to high saturation based on some normalized numerical scale (your example plot's antisense/sense ratio). A 2D heatmap may be less visually exciting than a modified joy-plot, but it will also be less ambiguous in terms of interpretation.

If this is from the publication, please provide the link to the paper, so we can see the context, then maybe we could suggest a better visualisation. At the moment, it looks like there is no need to make the y-axis tilted.