Nice entry for the jam! The overall concept is quite neat, but I think the execution could be improved a bit. FWIW, I don't think I had any input lag.
So, the jump physics are definitely weird, but I could see them being a feature rather than an issue. E.g. if bouncy boy didn't have a spring as his feet but a propeller, the physics would seem fairly natural (the propeller just barely overcomes gravity and lifts you up a bit before you crash down again). It definitely makes for a unique experience.
My main grudge is the lack of checkpoints combined with a weird difficulty curve. The hardest part of the game seems to be the initial black on white section. Once you get to the earth and grass tones, the game seemed fairly trivial until getting to the boss. But then you die to the boss and have to do it all again. Maybe breaking up the game into multiple shorter levels might help, and also letting the player get used to the mechanics with an initial safe section without abysses (so the only way to die is getting stuck or then later running into an enemy).
What I do really like is the mechanic of getting stuck in the autoscroller. It gives you a finite amount of mistakes you can make until you hit the left edge of the screen. Maybe this could be explored further by having some sort of power up that stops the screen scroll for half a second, so you can catch up a bit... and if you're doing really well, you'd want to avoid that power up, because the further right you are the less warning you get for upcoming obstacles.
As Mark would say, lots of potench here. :)