2D platformers: a game programmer’s guide High-Order Fun has a helpful guide to programming 2D platformers that walks through how to calculate basic movement, slopes, ladders, stairs, one-way ...

At launch, there were about 70 games, which increased to more than 100 titles, including some of the most popular classics like Super Mario Bros., Contra, The Legend of Zelda, and Mega Man.

Superpowers is a good program for developing or creating 2D & 3D games for Windows, Linux, Android, iOS. Not for novices & needs some getting used to.