Day 1: Reached Level 108 in 2 Hours and Called It a Day

It might vary by person... At the start, upgrade Gold and Speed moderately to around level 1-20? Then, focus entirely on the Dump. Master the third one first. Once buildings start constructing, you can start earning diamonds... After mastering the Dump, I went all-in on Speed. In this game, upgrading Gold and watching ads seems not recommended. Speed seems to be the key. If you play well, you might be able to clear the hidden stage within 2 hours, or 3 hours including ad time, up to level 120. Without ads, I estimate 3-4 days. There's an auto-ad feature in the mid-to-late game. Boosters accumulate, but I started experiencing lag around level 17 ㅠ. This might depend on the machine. Once the booster accumulation hit 20x, it was a whole new world... I didn't use the Gold Booster X. I upgraded money a bit at the start and then stopped. Didn't feel necessary. There are diamonds given for watching ads, but I skipped them. Initially, I watched all the buff ads, but after purchasing the booster, the 2x buff stopped (not sure if it's the truck buff, but the truck seems to disappear in the late game after all buildings are made). Bulldozer? Buff? I only watched ads for these until level 50 and then adjusted.