Wow, thanks a lot for your comment! you're bringing a lot of solid points about the game, and to be honest I'm impressed you've managed to catch all of the little details that we've added to the game, makes every second of polish worth it when someone catches it like that :)
First of all, control wise, everyone agreed, awful bindings, we want to add customizable bindings. But, we totally forgot to mention the fact that we used the Arrow Keys to playtest the game (and just forgot about it when we wrote the "torch notes",) and it's a lot lot lot easier to control the player that way, we've added a screenshot that will hopefully explain better all of the controls for the game, but we'll definitely update it with better bindings, for sure
As for the movement, pause could work for dashes, but most platforming games are really immediate with their controls, what you press is instantly what you get, apart from the rest mechanic all of the actions were meant to be quick and responsive, we're happy it worked for most of them!
Puzzles we've done last second (in our last day), it's insane that we've managed to finish 5 good levels, but yeah, 2.5 levels for the main mechanic might've been too short, but it is a game jam so the length it isn't that bad honestly, it'll be extended in the future, possibly with a second bench to go back and fourth between you and the ghost...?