If you want to speed up your progress without risking your account, players often recommend these legitimate methods from community guides like this Unlimited Coins video :
: Bombs are generally cheaper and inflict more "AoE" (Area of Effect) damage per coin spent, making them better for early-game farming. Destruction Simulator Infinite Coins Script
: Some claim to modify your currency balance directly, though many of these are visual "client-side" only and won't actually let you buy permanent upgrades. If you want to speed up your progress