Game that requires watching ads

In this game, the hidden quest involves pressing 'Claim' after clearing a stage to watch an ad and get 1 lightning-shaped currency. However, more than 50% of the time, when you press 'Claim', the ad runs, and when you're about to receive the final reward, it freezes like in the third picture, not proceeding to the next step. You can't click anything, and it just freezes. If you force close it, you can move to the next stage, but you don't get the currency. That's why I only have 7 currency items even after watching 18 stages and 18 ads. If this game's hidden quest pops up, I recommend that anyone who plans to play it and experiences a crash like mine after watching ads should probably skip it. The game itself is super simple, but there's no button to proceed to the next stage, and even after watching forced ads to move on, the currency isn't being added when I try to claim it.