Create coin

[JustinQ-DNHS]

• [x] Find coin.png
• [x] Make coin.png appear in game
• [ ] Make it so multiple copies of coin.png appear in game in locations of your choice
• [x] Make it so you can interact with the coin
• [x] Make coin disappear when it interacts with player
• [ ] Make coin add a point to a hidden variable when interacted with by player