I've gotten all of these to happen on web and windows download
I play with keyboard
Some of these may be intentional
Number one can happen when remapping controls, I'm not quite sure what causes it, but sometimes if you close the keybind screen by hitting 'a' and switching to the audio options when you go back it will think you are still changing a keybind and won't let you interact with the menu (this happened a few times but I can't replicate it for an image sorry)
Number two is a category of bugs that allow you to gain speed, first being platform boost, if you have upward momentum going into a floating platform (or anything that you can go through from below) and jump you gain a lot of upward momentum, this can be chained. Secondly there is corner boost, which has a similar setup to platform boost, except instead of a platform... its a corner, if you go over a corner at such an angle that you don't try to wall cling, but instead just float over it you can jump and gain a lot of upward momentum. Third is damage boost, when you take enviornmental damage and jump on the frame you respawn you get a lot of upward momentum (im sensing a pattern here), fourthly there is train boost, in fynn's shop if you walk in the oppisite direction that the train is moving it teleports your character, if you jump on the frame this happens you get enough upward momentum to boost to the ceiling.
There are a few others but I don't think they are very important
Number three: The only buttons that work for using the orca kick, the slam you get from beating richter for the second time, and dropping through platforms are up arrow and down arrow, even if you rekeybind move up and down to other things
not a bug but a suggestion, can you save the keybind info? because I have to reenter my setup every time
I'll reply with videos of various bugs