Rays of Gold (Hard) is the first stage in Growing Yellow.
Pretty easy stage. The player will face some easy Angelic enemies. Angelic enemies usually have very short range, and some have good charging skills, which can mess up your army.
A simple way to beat this stage is to stack up long range attackers like Paris Cat, Drama Cat, (Crazed) King Dragon Cat, etc. Don't forget to protect them properly with meatshields or with Artist Cat.
Strategy 1 (Ft. Momotaro)
Lineup: Artist Cat, Momotaro and some anti angel cats. Start stacking Artist Cat and Momotaro together. Momotaro can freeze the angel enemies and then artist cat can do some damage. Keep doing that until you reach the base. You should have more than 5000 money. Use it to buy some anti angel cats. This part can be skipped if you have a lvl 30+ ramen cat. Momotaro keeps the Heavenly Hippoes at bay, so they can’t do much. Once your Artist Cats kill the Heavenly Hippoes, it’s done!