No, it actually works. I found out that the jump mechanic is *really* bad tho - let me explain:
I expect the character to jump when you press the fire button, but he only jumps when you also press left or right - now that's a bad control scheme, totally imprecise. You constantly fall to your death because of that.
Overall cute game, but the control scheme is kabonkers, a good game brought down by bad controls :(