splitscreen? up to 4 players maybe?

...

Hi, what bike am I supposed to use there? I have 3 and can't use any of them.... Can't progress further in the game.

Do something about it!

I used the butter a lot of times, but its still counting as 0/50. I really want to 100% this game before try minidrivers, but sadly, the dev doesn't seem to want to fix this non-working achievement. Is anyone else bothered with this too?