Various improvements 👨‍👩‍👦‍👦👩‍👩‍👧‍👦👨‍👨‍👧‍👦

• Brighten up the night
• Use IM Fell English SC font for action bar (#62)
• Fix collision shapes on ponds (#63)
• Put opening text on UI Canvas (#64)
• Draw dirt underneath plants (#13, #65)