On: MAR1D: First-Person Mario

[twic]

Made me think of another one-dimensional crawl game, Line Wobbler:

https://wobblylabs.com/projects/wobbler

I'm not sure how well the site and videos explain it, but you control a green dot trying to travel along a line. You have to beat or evade enemies, lava, etc along the way. You control it with a spring door stop, but that's not what it's about.