Box art - Scribble Hero

Scribble Hero Buy More Coins

Of course to use all those weapons and utilities you'll need coins and those can be purchased as well. Keep in mind that just because you bought something doesn't mean it's equipped. You'll need to do that from the Equip screen, which appears before a mission. As for coins prices are:

Bag of 112,000 ($19.99)

Small Bag of 4,000 ($0.99)

Mega Bag of 14,500 ($2.99)

Ultra Bag of 52,000 ($9.99)

Ultimate Bag of 300,000 ($49.99)