CRYSTALS & BANKS
Happy Lil Dudes drop crystals that stay on the floor until you collect them. Drag each one onto a bank to store it. The more crystals pile up uncollected, the fewer new ones your dudes drop, so bank them to keep the flow going. Spend crystals in the shop on decor and bigger banks. A richer tank, and older Lil Dudes, drop more valuable crystals.