V4 Update - Leaderboard implementation and general bug fixing

New Update!

In this version I have fixed a bug regarding collecting coins, where you could sometimes collect it for twice the intended value due to a double hitbox check.

I've also added a leaderboard. At the end of a run, you'll have the opportunity to submit your score. The leaderboard will (currently) show the top 7 scores. Only your highest score is recorded. The leaderboard can also be accessed through an option in the main menu.