Relaxing & cool game! Some pretty engaging puzzle design here - all the toggles you've added for accessibility are welcome too. The only thing I'd recommend is lengthening the amount of time it takes to confirm an input - the undo button was a great addition for this, but I think the register time for movement/pushing boxes could be slightly different to circumvent erroneous inputs (maybe toggleable?). But with the constraints of a gamejam, it'd be  hard to tackle something like this addition in time, so great job regardless!

Nice game, very stylish! Only real complaints are not being able to see which levels have been completed on the level select menu, and that movement is a bit slow.