Yeah, Foolish Fire explained the treadmill "bug". I'm not saying that I expect a Jam game to be as polished as a full release game. It just seems a bit weird that your pixelart and platforming is so well made, but instead of getting some depth into the platforming mechanics. Instead, it's wasted (in my opinion) on joke upgrades that don't change anything of substance. That would be okay if that would go along with mechanical upgrades, but instead it's just jokes that, for me at least, did not land once. Especially when a lot of the upgrade jokes are any combination of useless and annoying. There are also little things like the elevator joke on the side being too far away, so you can only read the last two words, etc.
Add to that the fact that a lot of time is wasted on the players part because you have to wait. Wait for the platforms to get into usefull positions. Wait for the treadmill to move you left. Wait for the elevator. That just destroys any of the pacing you manage to create with the tight controls.
That's the reason why I'm even complaining. Beneath all the jokes that never landed and questionable pacing design, there is beautiful pixel art, great controls and an interesting mechanic in its limitation that might be able to be crafted into level design that webs like a metroidvania by just getting the ability to go right after 2/3 of the game.