Pay to win – Stick Fight: Shadow Warrior Review

I’m stuck on the black yellow belt because the last challenge I need is to kill 15 enemies with a dagger and you have to pay 1.00$ for a dagger or unlock the black belt. You can’t unlock the black belt if you can’t get passed the yellow black belt. Also, I can’t skip the challenge because it says “you cannot skip weapon challenges.” Please, respond if you can.
Review by Hxneyyy_._ on Stick Fight: Shadow Warrior.