Rebuilding a PC

I spent most of the day rebuilding a PC , installing Ubuntu Mate, running the latest updates and installing additional applications. This box may have a wonky power supply so I ordered a new one from Newegg. They just happened to have one on sale for $22.

I then started on creating the game with Fuzzawasit. I have him walking and jumping as well as a few platforms. I need to figure out how to make the platforms not just hang in space but be affected by gravity. This probably means turning them into something other than a platform.