Ads are long and numerous!

I tried it because it appeared in a title quest, but after clearing each stage, an ad longer than a minute plays, and I can't skip it, so it's become a game of watching ads. It feels like 15 minutes of gameplay followed by 15 minutes of ads, making it 30 minutes. Since the ad time isn't included in the measurement, it's more of a trial than I expected. There are hidden quests too, but... but...