Smash Karts

In this Nintendo Entertainment System (NES) launch title, players must use the Zapper laser gun to target moving ducks as they fly across the screen.

Mastermind is a free and open-source version of the famous logic puzzle game in which you have a limited number of chances to predict a color code, with each try providing information on which of your colors are correct and if they're in the correct order in the code.

I'm not opposed to the odd ad or a well-thought-out in-app purchase plan. What about adverts that last more than 30 seconds and cannot be skipped? Interruptions that cause me to lose focus during a game? Should microtransactions be compensated?