https://itunes.apple.com/us/app/knock-balls/id1424257445
https://itunes.apple.com/app/brick-slasher/id1373228088
A gun. Create the logic of the gun, and shoot it with a tap on the target. Number of rounds is limited by the formula: 3 * level of the game. Amount of cartridges to display in digits on UI.
Goals. Small construction with cubes. She stands on a height.
Level system. To complete the level, you need to shoot down all the cubes before the shells run out. Display progress on UI. On the left is the current level, on the right is the next. Make 10 levels for the test.