Game crashes when many enemies are present

This game is cool. However, it crashes every single time I am doing a veterans mission with many people shooting at you. Please fix this. Also, Ive played this game soooo long and was able to saved up enough credits to buy the Ranger model-12 sniper but since transferring phone, I cannot get it back along with my game progress :( any help on getting the sniper back would be awesome!

Sh000t3r about Contract Killer 2, v3.0.4