I absolutely Love this entire, the only things I felt where off were there was not much urgency because your timer is off to the side and there I did not notice it till my second play-through maybe change the position of the timer and make it larger maybe, also the collisions for the slime is a bit off I think every time I would jump onto a moving platform I would get suck and either get shot up/down and get repositioned to the floor or I would have to move forward and jump over it i would not jump on top of thew higher part of the moving platform when I was on the lower part of it (I believe it was the safe), also 1 suggestion change the colors of your clones/duplicated/copies,
Good Job and Good luck