Release update v0.1.1

I'm glad to share my first update. It basically gives an objective to the player and implements a level selector. Here you have the notes of the update:

• 3 new levels
• New mechanics:
  • Portal: It teleports you to the next level if you have enough coins
  • Coin objective: You have to collect an amount of coins to unlock the next level
• UI improvements:
  • Implementation of a level selector
  • Implementation of a money counter

I hope you enjoy the new things and let me know if you find some bugs or you want to make a suggestion on what you would see in the next update.