Nicely aligned and perfectly square pixels in pixel-art! It was a bit of a shame to see some aliasing and misalignmend on the fonts after such a great job (I guess, text has a sub-pixel offset). And very nice and moody music!
Stairs jumping remainded me of Banana Prince. The precision it requires does not allow me to pass through level 1-6, unfortunately. Different abilities were fun to play with though.
I would also recommend to take screen size into account. From your screenshots I can see how it supposed to look, but on my monitor I see the whole level zoomed out really far (maybe that contributed ability to see the distance).