DirectX Runtime is not an "extra program" on the sense that it breaks the rule. It's a driver that probably is installed on your machine but the version you have doesn't support the engine they used
its a bit hard to figure out but it's fun once you do!
soundtrack is not available for download yet, but you can listen to the main theme here :>
looks great, but could use some work on the collision of the platforms, got stuck multiple times at the edges and screen transitions
