A Game That Makes You Think: Is Watching Ads Necessary for Strategy?

I downloaded this game aiming for the Time Quest. It combines a puzzle game where you sort parked buses 🚌 with a color-sorting game. This game really makes you use your brain 🧠. It's been a while since a game made me think this hard. When you get stuck on a strategy, watching an ad gives you more slots to park the buses 🚌, which helps with progression. If you use your head, it's possible to clear it without watching ads. However, unless you're exceptionally brilliant, clearing it will be quite difficult... I thought it's good for a brain workout, so it's better to play it when you feel like it, rather than every day.