It's an interesting game idea. Took me a bit to figure out what to do. Didn't help that I have to refresh the page to get it to restart and it kills you right away and freezes if you aren't quick enough.
Yeah, originally speed cap randomization was tied to how long you had been playing(so the first ones were always slow), but that got scrapped along with restarting and some scoring mechanics.
I also found the core loop interesting, so I might flesh it out in another version.