So hard to level up

The path to leveling up definitely requires careful planning; just stacking resources isn't always the most efficient. Could I see your current detailed status? Perhaps we can find a better way to allocate your resources.

Low levels are fine, but high levels are a bit of a waste unless you have a lot of diamonds.

Save your diamonds for gold. Try not to upgrade, it's a real waste otherwise.

Really~

Don't use diamonds for upgrades unless they're fully maxed. The daily two 1,000 diamond ads have an approximate 1-hour cooldown. Diamonds on this platform are for exchanging into gold, which is then used in the shop.