Press x at the cover. Press m to stop the music. Press r in "game" or "change"or "store" to go to the lobby. You have to have 25 kills to upgrade. If you bought a smg press 1, if you bought a shotgun press 2, and if you bought a sniper press 3. HEART AND STAR!!
More updates will come soon (May 10 - May 15) All credits to https://Reddit. and my bro ❤