v5

• fish now have rarity
• added new fish: yellow tang, pond smelt, loach, chub, dab, crucian carp
• bugfix: fish no longer fail to eat food when multiple are placed
• fish randomly release bubble particles
• animated food sprite
• yellow outline when fish is hungry
• green outline after level up
• background music
• fish collision sound effect
• coin collect sound effect
• level up sound effect / particle
• fish eating sound effect
• menu open/close sound effect
• purchase/cant sound effect
• simple moving water effect