Jo, new 1.2 update just launched! Make sure to let me know about issues or bugs. Sadly the mobile built for the game is kinda broken so, If you want to play the game on mobile, you should play the web version for now: https://www.construct.net/en/free-online-games/gun-army-v1-2-web-demo-36031/play?via=pp
In the next future, the mobile built will be fixed!