Changelog:

- Added cases, they can drop: 3500 coins (common), 5000 coins (rare), iron fighter skin (very rare), gold skin (ultra rare)

- Added an experience bar, which can be replenished by killing zombies, and also when reaching a new level, you can get a case

- Added levels to the experience bar, you can increase it by getting more experience

- Added a code activation field

- The first DLC has been released - https://fixcode.itch.io/x100-cases-code-sm2