It's honestly a fun game, but becomes incredibly difficult after only a little bit. The shotgun is too slow and doesn't seem to be faster or stronger after upgrading. The energy system is horrible. You get like 5 or 6 plays then you wait for a long time. The coin system sucks as well. You get less than a thousand coins for each match and it requires well over a couple thousand to upgrade or buy. The game is fun, but it's too difficult and has a horrible system.