Titanium Forge is a multi-platform creator to make fast and powerful games with simplistic ease while getting you ready for future languages such as Java, C, ect...
Games created in Tf can be played on any newer OS such as Mac 10.4+, Windows, and Linux.
If you want some guidance on building a game in Tf, you could register on the forums, download the latest release, and follow a tutorial or look in the Example Games folder. If you need any help, just post.
-Gandolf