There's an animation glitch where the mouth opens if you hit space too quickly after eating a cow, but it will still read that the button is being held. It was something that came up during testing that I lacked time to fix, yep, but I do intend to add more to this game later and fix that bug.
Not a bad idea under normal circumstances, but I think multipliers would be frustrating for a lot of players, given that the cows are supposed to overlap and that's part of the "challenge", such that it is lol. It would def make combos more a matter of luck than skill. I'm introducing more randomized speeds and spawn times later, and probably multiple tracks for variety.
Thanks for the feedback!