slime does have some sound effects, though granted they are a bit quiet. as for the loudspeakers, if you accidentally exit their detection range before they're done, you can just go back and they'll say what they usually say again.
the wall pushing thing is admittedly an oversight, though - i meant to make one but just forgot 😅 thanks for playing though!! the platforming is a bit generic but this is the sort of intro "tutorial" area - we have lots of plans to shake it up a bit later on