Wow. What a blast. Not like boring defense games where you sit back and do nothing. This game puts you into the action! plus This is the first tower defense game that I have played where your "towers" (gunslingers) can move after you buy them. The controls can be a little difficult at times when you try to select a gunslinger that is right next to another, but overall this is not a huge detriment. The controls are pretty intuitive once you get used to playing. overall Well polished gameplay with hours of fun. Bit fiddly on a small phone, but the HD version is excellent.
but that just my opinion you can watch this this video to have a bigger idea about the game.
