really good-looking and entertaining game! mechanics are clear and so simple that they are self explanatory, good job for that! the loop is clear and it makes more sense for the GMTK one.
levels are fine but, have you considered resetting the whole level state and make them shorter? resetting the position only makes me want more! i mean, the time trial makes less sense for me because you can just reset the time every time you get a key or use the key.
apart from that, it is very well served, the theme is on point. well done!