We love the Yellow Submarine from the Beatles and its really nice that our style reminds you of that.
Do you mean the thorn bushes? - because we're not sure which vines you are talking about haha. :)
That Buddy didn't showed up by pressing "F" wasn't a bug actually - Buddy can't jump and is afraight of heights so you need to carry him over by letting him jump on your shoulders haha. We should point that out in an extra dialogue or cutscene to be sure the player won't miss that.
We're really happy that you enjoyed playing our game anyways.