This game combined halfway decent gameplay with literally EVERYTHING people hate about mobile games. But even the gameplay has its share of faults. First, the targeting for your autofire is laughably bad. A powerful enemy right near you is at low health? Now is the time for your tracking to switch to a harmless melee enemy that has no chance of hurting you, to make sure the nearby ranged enemy has a chance to get some more shots off at you. It will even sometimes aim at an enemy behind a wall that you can't hit when you have another enemy right in front of you bearing down on you. Also, one of the game's mechanics for adding difficulty is apparently "Let's zoom the screen in a lot so you can't see enemies and shots until they are too close to get out of the way." which is just plain stupid. That is weak game development. There there is the confusion. An in game merchant wants to sell me a weapon. Must be an upgrade, right? Nope! I just paid 250 gems for a pop gun that takes 5 times longer to kill an enemy than the one I had. But I had NO WAY of knowing what I was buying. No way to see the stats before I bought. And of course, what good is an upgrade game without ads. Lots and lots of ads. And the ads in this game are the worst I have ever seen in a decade of mobile gaming. They show a full 30 seconds ad, following by 10 seconds of "Tap to play" or just a static screen. Then after tapping the X, there is ANOTHER 3-5 second static screen before another X comes out. You can say they don't control the ads, but they do. They choose to partner with this ad company obviously because their awful tactics pay the most. And if it isn't an ad for other games it is "BUY SOMETHING!" Want to upgrade your weapons? Well, you aren't getting very high by playing. Drops are too infrequent and your "lightning" wear down fast meaning you can't play for awhile. (Unless you pay.) Developers...why do you want me to not play your game? When I play, I watch ads! Seems INSANE to say "You can't play for another hour while your "lightning" replenishes. Oh, and want to play in special events? Well, some require items that I still have not seen a single one of. So..."PAY US! We'll give you some!" And make you you pay to upgrade. Because when they say a special event is "Easy" difficulty, they mean for people who have bought a $50+ upgrade pack and are overpowered. For people who are trying to upgrade through just game play pickups? You will die on the first or second stage. Guaranteed. So...PAY THEM! They had no intention of making a good game. Just to get you to pay them.