I really like this game. Mechanic is excellent and it makes quite good gameplay. Music and art are also great, I liked skins the most. Addicting and fun!
Here are some tips for players in the future:
1. Buy only the best equipment
2. Buy magnets first, 2 of them on 2 characters
3. After you get enough money, buy armour and big bullets for 3 characters.
4. Collect about 40000-50000 cash. Really. You can remove and add armour to your characters, so they will be healed, and you don't have to watch ads to do so.
5. Make 1 character with speed, it will be enough for you to move, and get less damage.
6. Name your characters after people you don't like, so you can watch them die :)