BUG FIXES:
1. Fixed the bug that scores could not be uploaded
2. Fixed the bug of clicking any key on the keyboard to enter the window mode.
3. Fixed the bug that sprint skills cannot be used in season mode.
NEW CONTENT:
1. A new upgrade page has been added. You can use gold coins to purchase some upgrade props before each game: now you can try to upgrade in terms of "sprint recovery speed", "weapon box generation speed", "collision damage reduction", etc. Your single game experience! And get a better ranking on the leaderboard!
2. Added "scores required for the next challenge" UI prompt in the game