Thanks for the tip! I played a bit more but I got stuck and gave up again after hitting a death loop at a respawn point shortly after breaking another mirror a little further along:
Viewing post in Jinx; the Thirteens jam comments
Its possible to avoid dying by moving right the moment you spawn. At least that works for me. Since the cat spawns a bit in the air, you can avoid the spikes before you land on them.
Also, make sure to backtrack now while you still can, there are two horseshoes right before that save point that you seem to have missed, judging from the numbers on your screenshot.
I hate those horseshoes...