I bought Gatling Gears because $2.50
What were they thinking with that goddamned camera? You spend most of the game butted up against the edge of the screen in order to make forward progress. Because of this you'll often run headlong into enemies that you cannot see. It's inexcusable.
Also the titular Gatling Guns have a range of like 30 yards. Even when powered up significantly they don't reach the edge of the screen. That is just weird.
Also also seeing the incoming shadows of flying enemies for a solid half minute but being unable to attack them because all of your weapons stop at the edge of the screen (if not before) is painful. Especially when they are bullet sponges and you need as much time as possible to bring them down.
The cannon, grenades, and screen bomb are all satisfying to use. I really dig the game's concept, and I like the art style and graphics well enough, but these game design flaws destroy almost all the fun it could deliver. Such a wasted opportunity. Rarely do I see a game that could have been so vastly improved with such minuscule tweaks.