Fun idea, it's like Super Meat Boy's level replay shows up during the play and gets in a way :D
Random spawners make the levels more replayable, but at the same time of unpredictable difficulty — the same level could be very easy or very hard based on the random.
I think if the colliders were a bit more forgiving (without hands & legs) and the movement more fluid (SMB-like), that'd feel even better. Nice job anyway!