Thanks for the feedback! I can definitely understand that the controls are a bit awkward, I think that’s a common response to Stephen’s Sausage Roll as well. Worth calling out nonetheless, though!
As for the bug in the fourth level, I’m not sure what you by taking the excavator. Do you mean that you picked up one of the green lifts? If so, that’s not really expected in that level, but it is allowed (and central) to most of the following levels. Let me know if I’m misunderstanding, though – if there’s another issue, I’d be interested to hear it so I can be aware/figure out what went wrong.